SMC PENTAX-M* 67  1:6.7  800mm  ED(IF)
Produced 1999 Serial Numbers 8463xxx - 8613xxx. AOCo Product No.xxx.  Updated May 2024.

(Research Note: Since 2015 I have seen 2.20% (19 copies) of the total estimated 860 copies made.)

LENS PRODUCTION  (∑ lenses)  ∑n = 19 Serial Numbers observed in 11 Batches covering 193 SN min. < ∑ lenses < 1,534 SN max.
SN min. = accumulated total of serial numbers observed within 11 batches
SN max. = accumulated total of serial numbers observed between adjacent batches of other lenses.

8463141 (1/ 1)
8464033 (1/ 1)
8469875 (1/ 1)

 Serial Numbers in 11 Batches 
(n /SN range)
8471927 to 8471972 (2/ 45)
8571878 to 8571879 (2/ 2)
8576524 to 8576550 (2/ 26)
8582442 (1/ 1)

​
8588453 to 8588562 (6/ 109)
8597056 (1/ 1)
8606402 (1/ 1)
8613767 to 8613772 (2/ 5)