SMC PENTAX 67 MACRO 1:4  135mm
Produced 1980's. Serial Numbers 8529xxx - 8822xxx. AOCo Product No.xxx.  Updated April 2024.

(Research Note: Since 2015 I have seen 1.19% (278 copies) of the total estimated 23,300 copies made.)

LENS PRODUCTION  (∑ lenses)  ∑n = 278 Serial Numbers observed in 70 Batches covering 12,291SN min. < ∑ lenses < 37,379SN max.
SN min. = accumulated total of serial numbers observed within 70 batches
SN max. = accumulated total of serial numbers observed between adjacent batches of other lenses.

8529328 to 8529642 (9/ 314)
8531709 to 8531770 (3/ 61)
8538837 to 8539692 (16/ 855)
8541062 to 8541365 (4/ 303)
8543923 to 8544727 (14/ 804)
8550016 (1/ 1)
8550258 (1/ 1)
8550366 to 8550410 (2/ 44)
8551856 (1/ 1)
8551893 (1/ 1)
8552006 to 8552155 (5/ 149)
8552592 to 8552604 (2/ 12)
8552721 to 8553082 (8/ 361)
8553164 to 8553279 (5/ 115)
8553384 (1/ 1)
8553399 to 8553420 (2/ 21)
8553450 (1/ 1)
8553496 (1/ 1)
8553524 (1/ 1)
8553594 (1/ 1)
8559237 to 8559359 (4/ 122)
8561532 to 85626389 (15/ 1157)
8620014 to 8620016 (2/ 2)
8671247 to 8672287 (14/ 1040)

 Serial Numbers in 70 Batches 
(n /SN range)

8675240 to 8676268 (26/ 1028)
8684717 to 8685077 (4/ 360)
8686713 to 8687126 (5/ 413)
8689926 to 8689965 (2/ 39)
8690678 to 8690905 (7/ 227)
8693488 to 8693822 (6/ 334)
8697125 to 8697753 (9/ 625)
8700737 to 8700994 (5/ 257)
8704949 to 8705234 (8/ 285)
8710305 to 8710372 (5/ 67)
8713624 to 8714398 (12/ 774)
8723714 to 8724011 (6/ 297)
8727533 to 8728537 (14/ 1004)
8739538 to 8739548 (2/ 10)
8741062 (1/ 1)
8743842 (1/ 1)
8747967 to 87480xx (2/ 33)
8762448 (1/ 1)
8765993 to 8766058 (2/ 65)
8767488 to 8767718 (5/ 230)
8769602 to 8769678 (2/ 76)
8772452 to 8772472 (2/ 20)
8776003 (1/ 1)

8779282 to 8779482 (3/ 200)
8780877 (1/ 1)
8783897 to 8783932 (2 / 35)
8785733 (1/ 1)
8788683 to 8788813 (2/ 130)
8791202 to 8791317 (4/ 115)
8794792 (1/ 1)
8810237 to 8810282 (2/ 45)
8811472 (1/ 1)
8811752 (1/ 1)
8814333 (1/ 1)
8814668 (1/ 1)
8817582 to 8817668 (3/ 86)
8819346 (1/ 1)
8819426 (1/ 1)
8819595 (1/ 1)
8819651 (1/ 1)
8819676 (1/ 1)
8820308 (1/ 1)
8820443 to 8820498 (2/ 55)
8820883 to 8820893 (2/ 10)
8822363 to 8822378 (2/ 15)
8822513 to 8822583 (2/ 70)