SMC PENTAX 67 1:4 55mm
Produced 1986 - 2002. Serial Numbers 8507xxx - 8814xxx. AOCo Product No.....  Updated April 2024.

(Research Note: Since 2015 I have seen 0.72% (161 copies) of the total estimated 22,400 copies made.)

LENS PRODUCTION  (∑ lenses)  ∑n = 161 Serial Numbers observed in 58 Batches covering 11,312 SN min. < ∑ lenses < 33,508 SN max.
SN min. = accumulated total of serial numbers observed within 58 batches
SN max. = accumulated total of serial numbers observed between adjacent batches of other lenses.

8507165 (1/ 1)
8521506 to 8522723 (12/ 1217)
8523727 to 8524255 (5/ 528)
8524397 (1/ 1)
8527085 to 8527214 (4/ 129)
8528480 to 8528719 (5/ 226)
8530970 (1/ 1)
8532912 to 8533533 (2/ 621)
8535835 (1/ 1)
8537512 to 8537962 (6/ 418)
8540183 to 8540485 (4/ 44)
8541788 to 8542470 (7/ 682)
8547909 (1/ 1)
8552647 (1/ 1)
8553162 (1/ 1)
8553284 to 8553318 (3/ 34)
8553398 (1/ 1)
8553440 (1/ 1)
8553483 (1/ 1)
8553507 (1/ 1)

 Serial Numbers in 58 Batches 
(n /SN range)

8553533 (1/ 1)
8553599 to 8553774 (3/ 175)
8559510 (1/ 1)
8559972 to 8560511 (5/ 539)
8565537 to 8566304 (6/ 767)
8567771 to 8568638 (5/ 867)
8620563 (1/ 1)
8676481 to 8676692 (2/ 211)
8679253 to 8679887 (8/ 634)
8684103 to 8684315 (5/ 212)
8690012 to 8690350 (4/ 338)
8696030 to 8696561 (6/ 531)
8699221 to 8699398 (4/ 177)
8701747 (1/ 1)
8704537 to 8704857 (3/ 320)
8708587 to 8708813 (5/ 226)
8712116 to 8712593 (3/ 477)
8713316 to 8713447 (3/ 131)
8716377 to 8716652 (2/ 275)
8718683 (1/ 1)

8720851 to 8721167 (3/ 216)
8725088 to 8725238 (2/ 150)
8725568 (1/ 1)
8730203 to 8730431 (3/ 228)
8731033 to 8731547 (3/ 514)
8734623 to 8734728 (2/ 105)
8739777 (1/ 1)
8741492 (1/ 1)
8760761 to 8760772 (2/ 11)
8763827 (1/ 1)
8764842 to 8764843 (2/ 2)
8769077 (1/ 1)
8772618 (1/ 1)
8779078 (1/ 1)
8780647 to 8780682 (2/ 35)
8781188 to 8781308 (2/ 120)
8790343 (1/ 1)
8792172 to 8792183 (2/ 11)
8810661 (1/ 1)
8814832 to 8814948 (2/ 116)