SMC PENTAX 67 SOFT 1:3.5 120mm
Produced 1989 to 2001. Serial Numbers 8516xxx - 8752xxx. AOCo Product No.xxx.  Updated April 2024.

(Research Note: Since 2015 I have seen 2.88% (194 copies) of the total estimated 6,700 copies made.)

LENS PRODUCTION  (∑ lenses)  ∑n = 194 Serial Numbers observed in 24 Batches covering 4,221 SN min. < ∑ lenses < 9,246 SN max.
SN min. = accumulated total of serial numbers observed within 24 batches
SN max. = accumulated total of serial numbers observed between adjacent batches of other lenses.

​
8516599 to 8516913 (13/ 314)
8519598 to 8519905 (11/ 307)
8571541 to 8571790 (12/ 249)
8571948 to 8572204 (8/ 256)
8573803 to 8574044 (13/ 241)
8576133 to 8576288 (7/ 155)
8578128 to 8578386 (15/ 258)
8578873 to 8579083 (8/ 210)

 Serial Numbers in 24 Batches 
(n /SN range)
​
8581987 to 8582050 (6/ 63)
8582408 (1/1)
8582577 to 8582787 (7/ 210)
8586905 to 8587296 (14/ 391)
8588981 to 8589183 (9/ 202)
8590677 to 8590785 (6/ 108)
8592383 to 8592490 (5/ 107)
8594155 to 8594374 (10/ 219)

​
8595149 to 8595301 (9/ 152)
8595763 to 8596165 (19/ 402)
8601122 to 8601402 (10/ 280)
8603535 to 8603624 (5/ 89)
8612547 to 8612582 (3/ 35)
8614422 (1/ 1)
8620411 (1/ 1)
8752252 (1/ 1)