Last week I picked up two heavy chunks of metal and glass, better known as lenses. They are both M42 mount, and the Isco-Göttingen Edixa-Westagon 2.0/50 is the odd one out here. They were made from 1954 to 1970. and this one is probably from the fifties. No auto aperture but with a spring loaded lever that opens the aperture when activated. Isco-Göttingen started making Schneider lenses in the thirties and is today part of Schneider Kreuznach.
Sears on the other hand never made any lenses, the Sears 1.4/55 pictured here is said to have been made by Tomioka, but nobody can prove it
I'm posting two shots from the Westagon in the weekend thread, the Sears will have to wait till next week.