This is a rare prewar FED telephoto lens, 100mm f:6.3. The lens is clean and smooth mechanically, the glass is also clean.
The lens was made in the late 1930's by the FED commune. It is exceptionally well finished and comes with metal rear and front caps. The case is made of cardboard covered by fabric.
(source: www.fedka.com)
At least two series were made with two pins (written 1st in the following list) or without (written 2nd). Probably to help the owner to screw or unscrew the lens...
Recorded serial numbers:
x----------1st----DVD coll. (proto).
30968---1st----seen on eBay.
31213----id-----id.
31505----id-----id.
31549----id-----id.
32058----id-----id.
33056----?------Aidas collection.
34069---1st----Soviet camera store.
34292----id-----seen on eBay.
34406----id-----DVD.
34545----id-----eBay, modified for Zenit.
34629----id-----seen on Molotok.
34922----id-----seen on eBay.
35027----id-----id.
35148----id-----id.
35211----id-----id.
35275----id-----id.
36251-----?-----id.
36261---2nd----seen on Molotok.
36289-----?-----DVD.
36506---1st----seen on eBay.
37021-----?-----PY-C collection.
37270---2nd----seen on eBay.
38124----id-----DVD.
38198----id-----PY-C collection.
38548----id-----Alain Berry collection.
39112----id-----Jacques Morin collection.
39230----id-----DVD.
39560----id-----Seen on Molotok.
39663----id-----seen on eBay.