This conundrum was lost in another thread. Please tell me what this lens is besides being cannibalized. Note in the two photos that the fstops have different numerical sequences: On the face it reads "Leitz Elmar 1:3,5 F=50mm with fstops: 3,5 4,5 6,3 9 12,5 18" On the base the fstops are | 4 5,6 8 11 16 Which part of the lens is correct? Is it just a fake front plate? And if so, is it at least a faithful copy of a real Elmar? Or is there some noticable counterfeiting error or omission? Could I have a legit Elmar and a cannibalized base plate? They obviously don't match and I don't see any serial number. Where would it be, if it were the genuine article? Have any of you seen this combination before? Has anyone put one together like this, because of a missing or damaged part? Thanks in advance for any help in determining what this is. The photos it takes are quite decent. I'll post a scan tomorrow.