Hi Michael, Artilleries that were reworked for the Weimar Navy are discussed in Jan C. Still's Weimar Lugers, and one is pictured. They come up for auction every once in a while (see link). They should have all the Imperial markings and, most likely, have 1920 stamped on the chamber. Regards, Norm
http://www.gregmartinauctions.com/Au...px?LotID=23627