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Summicron 50 (11819) serial number/year query


philipus

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The Wiki's entry for version II of the 50mm Summicron includes the 11819 twice in the list of serial numbers, for 1970 and 1973:

 

2385701 2387700 Summicron f= 5 cm 1:2 (black 11 819) 1970 2000

 

2583501 2585500 Summicron f= 5 cm 1:2 (black 11 819) 1973 2000

 

The 11819 Summicron is version III, which was manufactured from 1978 (Wiki).

 

Did they really make the version III Summicron already in 1970/73?

 

Do the version III Summicrons in these two batches look differently than the ones made from 1978 onwards? I am asking because the entry for version III states that lenses pre-1984 had focus tabs.

 

Cheers and thanks

Philip

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