This is a two dioptric close up lens made before WWII, probably by Fed.
About the "goggles" (pict.2), please have a look at the Princelle, p273. The special finder shows the same mark.
I found this close up lens on my Fed 1a (1935). Jacques M. collection.
Uploaded on 1/24/2011 8:44:49 AM by Jacques M.
Uploaded on 1/24/2011 8:43:56 AM by Jacques M.
Uploaded on 1/24/2011 8:43:18 AM by Jacques M.