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).
No #----1st------Jim McGee
30968---1st----seen on eBay.
31213----id-----id.
31505----id-----id.
31549----id-----id.
31737----1st-----Jim McGee
32058----id-----id.
33056----?------Aidas collection.
33886----1st-----Jim McGee
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.
35406--- 1st-----Jim McGee
36251-----?-----id.
36261---2nd----seen on Molotok.
36289-----?-----DVD.
36506---1st----seen on eBay.
37021-----?-----PY-C collection.
37270---2nd----seen on eBay.
37349---2nd---- Stephanvdz
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.