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From: Ron
Remote Name: 68.231.53.22
Date: 01/22/2011
Time: 02:49:13 PM
Mark, D.R.G.M. stands for Deutsches Reichs Gebrauchmuster or German (State) Patent or protected prototype. I don't know who was issued that number, but it may be an unmarked print under glaze (PUG) made by Adolph Diesinger. The thumblift has been bent. Ron