Collection - by camera, name, model, type (version)
Innovation, function and fashion changed Takumars over their production periods and none remained unaltered. 
These are the oldest lenses in my collection; all M42 screw mounts. Most are purchased between 2010 and 2015. The notes below describe how they differ from each other. 
Takumar Field Guide covers each model more comprehensively by drawing upon examples in a larger range of serial numbers for each lens type.
Camera 
Asahi Pentax 
May 1957-March 1958
Contemporary Lenses 
Serial Numbers
No 150970

For lenses with discrete finger grips on Focus rings (F) and/or Aperture rings (A), then; * = number of grooves per finger grip / number of finger grips on ring.      
T a k u m a r   1 : 2.2   f = 55 mm
May 1957-May 1959
T a k u m a r   1 : 2   f = 58 mm
May 1957-March 1958
T a k u m a r   1 : 2.4   f = 58 m m
May 1957-March 1958
No 151360
No 165598
No 138204

No 137400
F10/12* Distance scale white "Feet/Meter".

F10/12* Distance scale white "Meter". Aperture ring Infra-red mark "R" (diagonal).
F10/12* Distance scale white "Feet".
T a k u m a r   1 : 1.9   f = 83 mm
Dec. 1957-Dec. 1959, AOCo Product No.322  
No 167523
F10/12 "Feet/Meter"scales white. Aperture ring 1.9-22 (8 stops; no half-stops). Focus 1.06m minimum.
T a k u m a r   1 : 3.5   f = 100 mm
Sept. 1957- 1958, AOCo Product No. -  
T a k u m a r   1 : 3.5   f = 135 mm 
Dec. 1957-1961, AOCo Product No.342, Model I 





  

T a k u m a r  1 : 3.5 / 135  
No 152664

No 144062

No 152235
No 168091 

No 294850

No 294888
311899

327422
388205
588700
F10/12 "Feet/Meter"scales white. Aperture ring 3.5-22 (7 stops; no half-stops). Focus 1.2m minimum.
F11/12 Distance scale all white "Feet/Meter." Aperture rings lack half-stops. Focus ring has wide grips and moves beyond 2 m on distance scale finishing at 1.8m. 
As above.
F10/12 Distance scale all white "Feet/Meter." Aperture rings lack half-stops. Focus ring has narrow grips and moves beyond 2m on distance scale finishing at 1.8m. 
F10/12 Distance scale all white "Feet/Meter." Aperture rings have 3 half-stops. Focus ring has narrow grips and finishes at 2m on distance scale.
As above.
As above. Name changed. "Japan" replaced by "Lens made in Japan". Serial number re-located to lead name rather than follow and no prefix.
As above.
As above. Distance scale bi-coloured; "Meter" yellow and "Feet", including ∞ symbol, blue.
As above. 
T a k u m a r  1 : 4  f = 300 mm 
May 1958-1962, Model I






T a k u m a r  1 : 5  f = 500 mm 
Sept. 1957-1961, Model I
No 167927



No 192191
No 192254
No 275467

No 193416
F12/12. SN with prefix follows name of lens. Distance scales all white "ft/m." White aperture setting mark. Aperture employs 18 blades. Six available stops on aperture ring, F22-4; no half-stops. Minimum focus distance 25ft or 7.5m. No IR focus mark. Rear DOF guage lines bent diagonally.
F12/12 As above. Except aperture setting mark is red.
As above.
F9/12 As above. Except Aperture ring includes 10 available stops, F22-4, with 4  half-stops marked by small white dots.
-
Cameras 
Asahi Pentax S
April 1958-May 1959
Asahi Pentax K
May 1958-May 1959
Contemporary Lenses
Serial Numbers
         -

No 172675


For lenses with discrete finger grips on Focus rings (F) and/or Aperture rings (A), then; * = number of grooves per finger grip / number of finger grips on ring.                                                                            
T a k u m a r   1 : 4   3 5 mm
May1958-May1959, AOCo Product No.329

T a k u m a r   1 : 4   f = 3 5 mm
T a k u m a r   1 : 1.8   f = 55 mm
April 1958-May 1959 
No 166214 


No 199147
-
F10/12* Distance scale all white "Feet/Meter".  Military mark "E-P" stamped into base.


F10/12 Distance scale all white "Feet/Meter".
F10/12
A u t o - T a k u m a r 1 : 1.8-22  f = 55mm 
May 1958-May 1959, AOCo Product No.332


A u t o - T a k u m a r 1 : 1.9-22  f = 55mm
North America retail market. 
T a k u m a r   1 : 8   f = 1000 mm
June 1958-1964, AOCo Product No.334 
No 180953


No 190782

        -
-
F10/12 Distance scale all white "Feet/Meter". Semi-automatic with a silver aperture ring and cocking lever. (c.f. the later automatic version often referred to as the first "Super-Takumar" )
As above.
                                                          
                                                              -
-
Cameras
Asahi Pentax S2 
Asahi Pentax H2
Honeywell Heiland Pentax H2
May 1958-April 1961 (Model I)
April 1961-Dec.1963 (Model II)
Contemporary Lenses
Serial Numbers
No. 339659 (II)
No. 196125 (I)
No. 251148 (I)



For lenses with discrete finger grips on Focus rings (F) and/or Aperture rings (A), then; * = number of grooves per finger grip / number of finger grips on ring.
                                                                                
A u t o - T a k u m a r  1 : 2.3  f = 35 mm
Sept.1958-1963, AOCo Product No.335



A u t o - T a k u m a r   1 : 2.3 / 35 





A u t o - T a k u m a r   1 : 2   f = 55 mm 
1959-1962, AOCo Product No.341


A u t o - T a k u m a r   1 : 2 / 55 
No 202869
No 281960



820874




No. 201591
No. 219776
No. 245261
No. 253354
336726

404029

429240
503177
F10/12* Distance scale all white "Feet/Meter." Aperture ring has 3 half-stops. 
F10/12 Distance scale all white "Feet/Meter." Aperture ring lacks half-stops. (Because it lacks half -stops this is a mosaic made from two lenses. The body was made in one of the early half dozen batches No 166xxx-No 194xxx). Base stamped "E-P" (See field guide: Takumar 4/35mm notes)

​F10/12 Name changed. "Japan" replaced by "Lens made in Japan". Serial number re-located to lead name rather than follow and no prefix. Distance scale tri-coloured; "Meter" yellow and "Feet", including ∞ symbol, blue. Orange-coloured snap-shot setting (f=8, 5m/15ft). Aperture ring has 3 half-stops. 

F10/12 Distance scale all white "Feet/Meter." Aperture rings have 5 half-stops.
As above.
As above.
As above.
As above. Name changed. "Japan" replaced by "Lens made in Japan". Serial number re-located to lead name rather than follow and no prefix.
As above. Distance scales bi-coloured; "Meter" yellow and "Feet", including ∞ symbol, blue.
As above.
As above
T a k u m a r  1 : 2.8  f = 105 mm 
Dec 1958-1961, AOCo Product No.331, Model I

T a k u m a r   1 : 2.8 / 105
A u t o - T a k u m a r  1 : 2.8  f = 105 mm
May 1959-1963, AOCo Product No.340


A u t o - T a k u m a r   1 : 2.8 / 105

 
No 215504


No 181954
No 210943
No 287592


520575
F10/12 "Feet/Meter"scales white. Aperture ring 2.8-22 (11 stops including 4 half stops marked by black dots). Focus 1.2m minimum.

F11/12 Distance scale all white "Feet/Meter." Aperture ring lacks half-stops.
F9/12 Distance scale all white "Feet/Meter." Aperture ring has 4 half-stops.
F9/12 Font changed from cursive to print. Distance scale all white "Feet/Meter." Aperture ring has 4 half-stops. 
F8/12 Name changed. "Japan" replaced by "Lens made in Japan". Serial number re-located to lead name rather than follow and no prefix. Font changed from cursive to print. Distance scale bi-coloured; "Meter" yellow and "Feet", including ∞ symbol, blue. Aperture ring has 4 half-stops.
T a k u m a r   1 : 3.5   f = 200 mm
May 1958-1965, AOCo Product No.338 
T a k u m a r   1 : 3.5  / 200







T a k u m a r  1 : 5   f = 500 mm 
1961-1965, AOCo Product No.326, Model II
No. 238000



993845



1105499
1236868
No 193416
F9/12 All white lettering in rounded font (print), including ft/m distance scales. Serial number with prefix follows name. DOF guage lines diverge and lack IR focus mark. Aperture ring with 10 positions including 3 half-stops marked by white dots.

F10/12 Name changed. "Japan" replaced by "Lens made in Japan". Serial number re-located to lead name rather than follow and no prefix. Font rounded (print). Distance scale bi-coloured; "m" yellow and "ft", including ∞ symbol, blue. Aperture rings has 3 half-stops. IR focus marker "R" between 22-16 on DOF gauge.
As above. 
F11/12 As above, except DOF gauge lines are parallel, not diverging. 
Distance scale all white "Feet/Meter." Aperture ring has 3 half-stops.
 T a k u m a r  1 : 5.6  / 200
June 1958-Feb. 1967, AOCo. Product No.347




T e l e - T a k u m a r  1 : 5.6  / 200
Feb 1967-1969, AOCo. Product No.351(43510)
658977


756368
1114657
1350241
2280411
F10/12 Font rounded (print) and serial number before name. Distance scales bi-coloured; "Meter" yellow and "Feet", including ∞ symbol, blue. Aperture rings include 3 marked half-stops. DOF gauge lines diverge and IR focus mark orange "R" on f=22.
As above.
F10/12 As above.
F10/12 As above except simplified DOF gauge with parallel lines. 
F10/12 Font oval (not rounded) and serial number re-located after lens name. Maker's name not followed by a comma.
Cameras 
Asahi Pentax S3
Honeywell Heiland Pentax H3 
April 1961-June1969

Asahi Pentax S1
Honeywell Pentax H1 
April 1961-Dec.1963
Contemporary Lenses
Serial Numbers
No. 320321, No. 443508, No. 494753
No. 295385, No. 316592, No. 316840 


No. 323187, No. 490683, No. 524129
                         -





For lenses with discrete finger grips on Focus rings (F) and/or Aperture rings (A), then; * = number of grooves per finger grip / number of finger grips on ring.
A u t o - T a k u m a r  1 : 3.5  f = 35 mm 
Sept.1959-1962, AOCo Product No.336

A u t o - T a k u m a r   1 : 3.5 / 35
 
No. 292548


300729

401057
566411
579736
582163
595388
728772
F9/12* Font rounded (print). Distance scale in cut away window, bi-coloured ft/m; "m" yellow ( including ∞ symbol) and "ft" blue. Aperture ring has 6 half-stops. DOF gauge lines are parallel, not diverging.
F9/12 As above. Name changed. "Japan" replaced by "Lens made in Japan". Serial number re-located to lead name rather than follow and no prefix.
F9/12 As above, except ∞ symbol now blue.
As above.
As above.
As above.
As above.
As above.
A u t o - T a k u m a r  1 : 1.8-16/ 55 
1960-1962, AOCo Product No.345

Three prototypes were developed. All have an aperture switch for fully automatic or manual control. The switch in Type 1 may differ from that in Types 2and 3.


Type 3 became the prototype "Super-Takumar 1:1.8 / 55" after more cosmetic changes. 


Underlining opposite helps comparisons between lenses. Some changes were kept and others rejected. 
293039 Type 1A
            (188 g)









293491 Type 1B
            (186 g)

293866 Type 1A
324726 Type 1B
325155 Type 1B

358418 Type 2A
           (215 g)







359645 
359942 Type 2B

366221 Type 2C

366104 


403169 Type 3A
           (215 g)

403241 Type 3B
            (215 g)

406264 Type 3C

408483

433548
462932
465533
495543

510390
515473
537916
547800
564471
635684
638927
663916
F10/12 Font rounded (print). Eight finger-shaped aperture blades with broad round "points". Dual distance scales in cut-away window all white; "m" white  and "ft" white (including ∞ symbol). Numeral "1.7" on feet scale is one decimal place, only.
Aperture ring black with fine knurls and 14 available settings (8 stops and 6 half-stops, the latter marked by large white half-stop dots between f=2 and f=16). Aperture opens by rotating the ring clockwise. DOF gauge lines diverge around orange centre line ending in (and joined to) an orange dot. Rear base plate and aperture switch thick, marked "A" (automatic) in white (LHS) and "M" (manual) in orange (RHS) in large font. Front of lens barrel is threaded onto a loose brass washer, internally. 

F10/12 As above. Distance scales in cut-away window, bi-coloured ft/m; "m" orange  and "ft" white (including ∞ symbol). Numeral "1.75" on feet scale is two decimal places. Front of lens is threaded on without a loose brass washer, internally. 

F10/12 As above
F10/12 As above.
F10/12 As above.

F10/12 Six aperture blades (shaped as in Type 1). Font rounded (print). Distance scale in cut-away window, bi-coloured ft/m; "m" white (including ∞ symbol) and "ft" orange. Aperture ring black with 14 available settings, including 6 half-stops between f=2 and f=16 marked by small white dots. DOF gauge lines diverge around orange centre line ending before (not joined to) an orange dot. Rear base plate and aperture switch thin, marked "A" (automatic) in white (LHS) and "M" (manual) in orange (RHS) in small font.

F10/12 As Type 2A above.
F10/12 As Type 2A above, except 6 white half-stop dots on aperture ring are small and the centre orange line on DOF gauge is joined to the orange dot (see 515473)

F10/12 As Type 2 above, except aperture switch is concave (as on contemporary Auto-Takumar 1:1.8 f=85 lenses).
F10/12 As Type 2C
 

F10/12 As Type 2 above with six new triangular aperture blades. Aperture switch regains former convex shape. Distance scale outside cut-away window, bi-coloured ft/m; "m" yellow and "ft" blue (including ∞ symbol).
F10/12 As Type 3A above. Distance scale inside cut-away window, bi-coloured ft/m; "m" yellow and "ft" blue (including ∞ symbol).

F10/12 As Type 3B, except the 6 half-stops are not marked by 6 white dots on the aperture ring although all 14 settings remain available.
F10/12 As above, except "ft/m" of distance scale is on LHS outside of the cut-away window where it can now be seen whilst focussing the lens. 
F10/12 As above.
F10/12 As above.
F10/12 As above.


F10/12 As above, except DOF gauge is simplified, lines now parallel around the orange centre line which ends in (and is joined to) an orange dot.
F10/12 As above.
F10/12 As above. Blue sheen on black anodised metal body parts. (Only this copy)
F10/12 As above.
F10/12 As above.
F11/12 As above, except IR focus marked "R" between 8-4 on DOF gauge.
F11/12 As above.
F11/12 As above.
A u t o - T a k u m a r   1 : 2.2 / 55
1961-1963
344029

403800
508542


645795
684822
F10/12 Font rounded (print). Distance scale all white "Feet/Meter." Aperture ring silver with 5 half-stops. DOF gauge lines diverge.
As above.
F9/12 Distance scale bi-coloured; "Meter" yellow and "Feet", including ∞ symbol, blue. Aperture ring black with stops and 5 half-stops coloured blue.

F10/12 As above, except IR focus marked "R" between 8-4 on DOF gauge.
F9/12 As above.
A u t o - T a k u m a r  1 : 1.8 f = 85 mm 
May 1960-1964, AOCo Product No.342
411591

521779
F12/8 Distance scale bi-coloured; "Meter" yellow and "Feet", including ∞ symbol, blue. Aperture ring has 7 half-stops. DOF gauge lines diverge.
As above.
T a k u m a r   1 : 2.8 / 105  
1961-1965, AOCo. Product No.349, Model II


S u p e r - T a k u m a r  1 : 2.8 / 105
1963-1971, AOCO Product Nos.350,4350,43501
573405

586257
722349


722819
1024774
1460121
F10/12 Font oval (not rounded). Distance scales bi-coloured ft/m; "m" yellow and "ft", including ∞ symbol, blue. Aperture rings have 4 half-stops. 
F10/12 As above.
F11/12 Font rounded (print). Distance scales bi-coloured; "Meter" yellow and "Feet", including ∞ symbol, blue. Aperture ring has 6 unmarked half-stops. Aperture control switch marked "A" (automatic) in white (RHS) and "M" (manual) in orange (LHS). DOF gauge lines parallel.
 As above.
F11/12 *A10/10 As above, except orange IR focus mark "R" between 16-11 on DOF gauge.
F9/12 A10/10 As above, except font oval (not rounded). DOF gauge lines longer and central orange line and dot not joined. Focus ring is narrower and the locking screw is not longer visible.
A u t o - T a k u m a r  1 : 3.5 / 135
Dec.1959-1963, AOCo Product No.343













T a k u m a r  1 : 4  f= 300 mm 
1962-1965, AOCo Product No.346, Model II



T a k u m a r   1 : 4 / 300 
363768




506448



517522
542856
543107
612952
613269
649849
No. 417313




904632




1248358
2118896
F11/8. SN before name; without a prefix. Font rounded (print). All lettering is white; "Meter" and "Feet" scales and ∞ symbol. Aperture ring has 11 marked settings (f=22-3.5) including 4 half-stops marked by white dots. (The aperture ring on this lens moves a half-stop beyond f=22.) DOF gauge lines diverge.  Without three screws in barrrel above DOF gauge. Approx. 309g
As above, except distance scales bi-coloured; "Meter" yellow and "Feet", including ∞ symbol, blue and three screws in barrel above DOF gauge and rear element screwed into place rather than glued. Approx. 317g
As above.
As above.
As above.
As above.
As above.
As above.
Rubberised grips. 18 blade iris. Font rounded (print). Distance scales all white ft/m.  Focus ring moves beyond 5.5m on distance scale finishing at 5m. DOF gauge lines diverge. Aperture ring scale f22-f4, has 4 marked half-stops. Fixed tripod collar with chromed locking nut.

As above, except name changed. "Japan" replaced by "Lens made in Japan". Serial number re-located to lead name rather than follow and no prefix. Distance scales bi-coloured ft/m; "m" yellow and "ft", including ∞ symbol, blue. IR focus mark orange "R" beyond f=22 on DOF gauge. 

As above,except DOF gauge lines parallel. 
As above, except font oval (not rounded). Serial number moved to follow name and aperture closes to f32. IR focus mark orange "R" on f=32 on DOF gauge.
Cameras
Asahi Pentax SV
Honeywell Pentax H3v


Asahi Pentax S1a
Honeywell Pentax H1a
July 1962-August 1968
Contemporary Lenses
Serial Numbers
No. 531989, 1834972
                           -
No. 682173, No.700826, No.702024, 1658327
1520425






For lenses with discrete finger grips on Focus rings (F) and/or Aperture rings (A), then; * = number of grooves per finger grip / number of finger grips on ring.
S u p e r - T a k u m a r  1 : 1.8 / 55
1962-1965, AOCo. Product No.345-2, Model I
Type1
Thin aperture switch not overhanging aperture ring + 14 aperture ring settings + aperture ring opens moving clockwise.













S u p e r - T a k u m a r  1 : 1.8 / 55
1962-1965, AOCo. Product No.345-5, Model I
Type2
Wide aperture switch overhangs aperture ring + 13 (or 14) settings + aperture ring opens moving anticlockwise
605470







652695
689533
692148
695022
712319
747188
810312
821868
870991

857119



893345
996947

1034843
1072795
1282887
F10/12* Otherwise as for 635684 above (Font rounded (print). Serial number precedes the name. Aperture opens by rotating the finely knurled ring clockwise and has 14 available settings, including 6 unmarked half-stops between f2-f16. Distance scales bi-coloured ft/m; "m" yellow and "ft", including ∞ symbol, blue. IR focus mark orange "R" beyond f=4 on DOF gauge with parallel lines.  Central DOF line orange and joined to dot. Rear base plate and aperture switch thin, marked "A" (automatic) in white (LHS) and "M" (manual) in orange (RHS) in small font.) 
F11/12 otherwise as above.
As above.
As above.
As above.
F10/12 otherwise as above
As above.
As above.
As above.
As above, except an orange diamond shape replaces the line ending in a dot in centre of DOF gauge. 
F9/12, otherwise as 870991 above, except aperture switch wide and overhanging aperture ring, marked "A" (automatic) in white (RHS) and "M" (manual) in orange (LHS) in small font. Aperture ring has 14 settings including 6 unmarked half-stops and opens moving anti-clockwise.  An orange diamond shape in centre of DOF gauge. 
As above.
F8/12. As above except 13 aperture settings available (unmarked half-stop f=11-f=16 not available).
F9/12, otherwise as above.
As above.
As above.
S u p e r - T a k u m a r  1 : 2 / 55
1962-1965, AOCo. Product No. 345-3, Model I
Type1 
Same as Product No.345-2 except the aperture ring lacks f=1.8 mark. F=1.8 is made unavailable by a diaphragm mask: a large fixed ring (allowing only f=2) which can be seen through the front of the lens. Despite this, Type 1 apertures open and aperture rings rotate to the unmarked f=1.8 position, but ineffectively behind the mask.


S u p e r - T a k u m a r  1 : 2 / 55
1962-1965, AOCo. Product No.345-6, Model I
Type2
As Product No.345-5 except aperture ring lacks f=2 mark. F=1.8 is made unavailable by a diaphragm mask: a large fixed ring (allowing only f=2) which can be seen inside the lens. Early Type 2 lenses also use the unmarked f=1.8 position ineffectively. Aperture rings on later Type 2 lenses cannot rotate beyond f=2.
624379








636191
742322
745250
862125
898528





937247
1035600
F10/12. As 605470 above except one stop (f=1.8) is missing from aperture ring. (i.e. Font rounded (print). Serial number precedes the name. Aperture opens by rotating the finely knurled ring clockwise and has 13 available settings, including 6 unmarked half-stops between f2-f16. Distance scales bi-coloured ft/m; "m" yellow and "ft", including ∞ symbol, blue. IR focus mark orange "R" beyond f=4 on DOF gauge with parallel lines.  Central DOF line orange and joined to dot. Rear base plate and aperture switch thin, marked "A" (automatic) in white (LHS) and "M" (manual) in orange (RHS) in small font.) 
F10/12. As above.
F11/12, otherwise as above.
F10/12, otherwise as above.
As above, except an orange diamond shape replaces the line ending in a dot in centre of DOF gauge. 
F9/12. As 857119 above, except one stop (f=1.8) is not marked on aperture ring (even though the ring rotates to that position.) (i.e. Aperture switch wide and overhanging aperture ring, marked "A" (automatic) in white (RHS) and "M" (manual) in orange (LHS) in small font. Aperture ring has 13 available settings including 6 unmarked half-stops and opens moving anti-clockwise.  An orange diamond shape in centre of DOF gauge.)
As above, except the aperture ring cannot rotate beyond the f=2 position.
F8/12, except the unmarked half-stop position from f=11 to f=16 is absent.
S u p e r - T a k u m a r  1 : 3.5 / 28
Sept.1962-1966, AOCo Product No.348 (43480), Model I
Type1; Aperture ring from f=22-3.5 + fine knurled.






S u p e r - T a k u m a r  1 : 3.5 / 28
Sept.1962-1966, AOCo Product No.43481, 
Model I
Type2; Aperture ring from f=16-3.5 + finger grips.
657770






810927
967439
992592
1861747




2005599
 F9/12 Font rounded (print) and serial number before name. Comma after maker's name. Distance scale bi-coloured; "Meter" yellow and "Feet", including ∞ symbol, blue. Aperture opens by rotating the finely knurled ring counter-clockwise and has 12 available settings, including 5 unmarked half-stops between f3.5-f22 and the f=4 position is marked by a white dot. DOF gauge has parallel lines and an orange bar and (separated) dot at its centre. Aperture switch  marked "A" (automatic) in white (RHS) and "M" (manual) in orange (LHS).
F9/12 As above, except IR focus mark orange with a small "R" beyond f=3.5 on DOF gauge.
F9/12 As above, except snapshot indication with orange lettering (f=8, 3m/10ft).
F9/12 As above.
F8/12, A8/11. Font oval (cursive) and 7-digit serial number after name. No comma after maker's name. Finger grips on focus and aperture rings. Aperture opens by rotating the ring counter-clockwise and has 9 available settings, including 3 unmarked half-stops between f3.5-f16 and the f=4 position is marked by a white dot.  Simpler DOF gauge lines parallel and meter scale reading 7.5 is reduced to 7.
As above. 
T a k u m a r  1 : 3.5 / 135
1961-1966, AOCo Product No.353, Model II












T a k u m a r  1 : 5.6  / 200
June 1958-Feb. 1967, AOCo. Product No. 347




T e l e - T a k u m a r  1 : 5.6  / 200

Feb 1967-1969, AOCo. Product No.351
725016





776723
793394
798810
1317490



658977


756368
1114657
1350241
2280411
F10/12. Font rounded (print).  Serial number precedes the name. Both preset aperture rings with fine knurling, each with 11 available settings from f=3.5 to f=22 including 4 half-stop positions marked by white dots. Distance scale bi-coloured; "Meter" yellow and "Feet", including ∞ symbol, blue. DOF gauge lines diverge around orange centre line ending in (and joined to) an orange triangle. IR focus mark orange with a small "R" beyond f=8 on DOF gauge.
F10/12
F10/12
F10/12
F10/12. Simplified DOF gauge with parallel lines around orange centre line ending in (and joined to) an orange triangle. IR focus mark orange with a large "R" beyond f=11 on DOF gauge.
F10/12 Font rounded (print) and serial number before name. Distance scales bi-coloured; "Meter" yellow and "Feet", including ∞ symbol, blue. Aperture rings include 3 marked half-stops. DOF gauge lines diverge and IR focus mark orange "R" on f=22.
As above.
F10/12 As above.
F10/12 As above except simplified DOF gauge with parallel lines. 
F10/12 Font oval (not rounded) and serial number re-located after lens name. Maker's name not followed by a comma.
T a k u m a r  1 : 6.3  / 300
June 1958-Feb. 1967, AOCo. Product No. 347




T e l e - T a k u m a r  1 : 6.3  / 300

Feb 1967-1969, AOCo. Product No.351
Cameras 
Asahi Pentax Spotmatic SP


Honeywell Pentax Spotmatic SP
(Honeywell Pentax H4)
July 1964-August 1974
Contemporary Lenses
Serial Numbers
No. 1075370, 1461114, 1473595, 2823984, 2893419 (Black), 2897661, 3578745, 3639287, 3667726, 3686944, 3904707
                           -



For lenses with discrete finger grips on Focus rings (F) and/or Aperture rings (A), then; * = number of grooves per finger grip / number of finger grips on ring.