1955 - 70 Fed 2 (F131) Type b has a removeable back as well as a
single rangefinder / viewfinder window. The Fed 2 came with different
color vulcanite coverings: blue, red, green, grey and sand as well as
black. This example is a early 1950's version with a Fed f3.5 / 50mm
lens.ugh the 1990's. The lens is an Industar-22 f3.5 / 50mm which
is not compatible with rangefinder M39 cameras due to different
indexing.