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Produced 1971 to 1975. Serial Numbers 4406xxx - 7557xxx. AOCo Product No. 43742. Honeywell Pentax Cat.No.7268. Updated Aug. 2025

(Research Note: Since 2010 I have seen 1.99% (508 copies) of the total estimated 25,500 copies made.)

INTRODUCTION

DESCRIPTION

VARIATION

NOTES

LENS PRODUCTION  (∑ lenses)  ∑n = 508 Serial Numbers observed in 31 batches covering 22,990 SN min. < ∑ lenses < 27,980 SN max.
SN min. = accumulated total of serial numbers observed within 31 batches
SN max. = accumulated total of serial numbers observed between adjacent batches of other lenses.
Focus ring F(10/12) ; Aperture ring A(10/10) ;  Nameplate font Oval and " ASAHI OPT. CO.," with following comma.
Two Styles:  ▲ IR marking includes "R" ▼ IR marking excludes "R"

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43741 SN ends
4406943 to 4407564 (13/ 621)
4408313 to 4408929 (16/ 616)
4840285 4840929 (17/ 644)
4842052 to 4842598 (10/ 546)
4843357 to 4843694 (7/ 337)
4844519 to 4845246 (7/ 727)
4845864 to 4846890 (24/ 1026)
4904523 to 4905533 (24/ 1010)
4907621 to 4908336 (16/ 715)
4908677 to 4909317 (14/ 640)
▲ 

Serial Numbers in 31 Batches 
(n /SN range) Collection
▼ 
4909541 to 4909987 (15/ 446)
5520036 to 5520046 (2/ 10)
5523685 to 5524881 (22/ 1196)
5526156 to 5526339 (8/ 183)
5526405 to 5526450 (3/ 45)
5526549 to 5527322 (12/ 773)
5528341 to 5529272 (14/ 931)
6100946 to 6101755 (22/ 809)
6104226 to 6105306 (27/ 1080)
6107494 to 6108736 (28/ 1242)
6108393
6110957 (1/ 1)

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6111276 to 6113502 (47/ 2226)
6231508 (1/ 1)
6730226 to 6730702 (12/ 476)
6736404 to 6739543 (63/ 3139)
7129199 to 7129878 (20/ 679)
7371414 (1/ 1)
7372937 to 7373xxx (2/ 63)
7374444 to 7376457 (43/ 2013)
7541059 to 7541992 (15/ 993)
7557525 (1/ 1)