philipus
ʎɐpɹəʇɥƃı&
Thank you very much David, that's really helpful. I agree, phone contact is often the way to go (horse's mouth and all that).
Best
Philip
Best
Philip
The SUMMITAR was uncoated prior to World War II, and was coated from about 1946 (about serial nr. 601,001).
The SUMMITAR originally had a 10-bladed diaphragm, which was changed back to the complex 6-bladed design of the previous SUMMAR (1933-1939) in 1950.