I own an Ernemann lens (front & rear cells, no shutter) which is in optically very good condition but I don't know what to do with it. It is 190mm, f6.8. The lettering includes the following: SPECIAL, No. RI 698. The cells came from a useless Copal #1 that I acquired somewhere along the line. Does anybody know anything about the lens? Is it worth anything?
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