SMC PENTAX-M* 67  1:4  300mm  ED(IF)
Produced 1999 Serial Numbers 8609xxx - 8618xxx. AOCo Product No.xxx.  Updated May 2024.

(Research Note: Since 2015 I have seen 2.46% (64 copies) of the total estimated 2,600 copies made.)

LENS PRODUCTION  (∑ lenses)  ∑n = 64 Serial Numbers observed in 22 Batches covering 1,101 SN min. < ∑ lenses < 4,105 SN max.
SN min. = accumulated total of serial numbers observed within 22 batches
SN max. = accumulated total of serial numbers observed between adjacent batches of other lenses.

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8609294 (1/ 1)
8609311 to 8609579 (11/ 268)
8609799 to 8609864 (3/ 65)
8609930 to 8610336 (20/ 406)
8611527 (1/ 1)
8611781 to 8611807 (3/ 26)
8612006 (1/ 1)

 Serial Numbers in 22 Batches 
(n /SN range)

8612189 (1/ 1)
8612221 to 8612225 (2/ 4)
8612462 (1/ 1)
8612806 to 8612830 (2/ 24)
8613230 (1/ 1)
8613641 to 8613713 (3/ 72)
8613878 (1/ 1)

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8614237 to 8614308 (2/ 71)
8615074 (1/ 1)
8616044 to 8616186 (3/ 142)
8617068 (1/ 1)
8617394 (1/ 1)
8617430 to 8617441 (2/ 11)
8618048 (1/ 1)
8618115 (2/ 67)