Special macro lens for the FED 1938/1939 producton. This special lens is not rangefinder coupled but goes from infinity up to 1:1 scales in continous focusing.
The optics is the renowned Industar 10 3.5/50.
Non numbered macro lenses can be found. According to some sellers, they could have been made in 1949 or 1950.
Registered numbers:
107-----------DVD (proto?)
12075--------Seen on eBay.
14568--------Jacques M. collection.
14764--------Alain Berry collection.
15136--------DVD collection.