Hello fellow members, I've uploaded some pictures on my disassembled Elmar that came with a (new to me) Leica II of 1932. The Elmar wasn't bearing a serial number, but when disassembled I found the number inside:
Elmar f3,5 50mm CLA by Ron (Netherlands), on Flickr
Elmar f3,5 50mm CLA by Ron (Netherlands), on Flickr