Super-Multi-Coated TAKUMAR / 6x7  1: 4 / 300
Produced 1971 to 1986 Serial Numbers 4840xxx - 8508xxx. AOCo Product No.xxx.  Updated March 2024.

(Research Note: Since 2015 I have seen 3.41% (383 copies) of the total estimated 11,200 copies made.)

LENS PRODUCTION  (∑ lenses)  ∑n = 383 Serial Numbers observed in 38 Batches covering 8,555 SN min. < ∑ lenses < 13,930 SN max.
SN min. = accumulated total of serial numbers observed within 38 batches
SN max. = accumulated total of serial numbers observed between adjacent batches of other lenses.

4840043 to 4840217 (7/ 174)
5683446 to 5683489 (5/ 43)
5684913 to 5684950 (2/ 37)
5685903 to 5685996 (4/ 93)
5686871 to 5686907 (3/ 36)
5690481 to 5690489 (2/ 8)
5691003 to 5691022 (3/ 19)
5691902 to 5691986 (6/ 84)
5692971 to 5692989 (3/ 18)
5693997 to 5694003 (2/ 6)
5694852 (1/ 1)
5695841 to 5695854 (2/ 13)

 Serial Numbers in 38 Batches 
(n /SN range)
​
5696637 to 5696720 (4/ 83)
5696846 (1/ 1)
5698633 to 5698952 (15/ 319)
7300335 to 7301896 (58/ 1561)
8213586 to 8213798 (10/ 212)
8214456 to 8214596 (6/ 140)
8226663 to 8226948 (14/ 286)
8239659 to 8239677 (3/ 18)
8239734 to 8240506 (30/ 772)
8258444 to 8258817 (9/ 373)
8261093 to 8262120 (44/ 1027)
8430470 to 8430975 (22/ 504)
8444045 to 8444743 (33/ 698)

8444854 (1/ 1)
8465644 (1/ 1)
8466287 to 8466757 (16/ 470)
8473921 to 8474084 (6/ 163)
8474849 to 8475019 (10/ 170)
8475430 to 8475494 (6/ 64)
8479878 to 8480026 (12/ 148)
8483133 to 8483238 (5/ 105)
8487283 to 8487616 (12/ 333)
8495292 to 8495408 (5/ 116)
8495478 to 8495821 (14/ 343)
8506118 (1/ 1)
8508521 to 8508788 (10/ 267)