The ZM and the register number show it was proofed in Zella-Mehlis, and was likely made in or near Zella-Mehlis for Guntermann to sell. It could very well have been finished in their shop. The 16 next to the 16 in a circle is the bore diameter ahead of the chamber, expressed in gauge measurement. This works out to 16.81mm. The lower case z is likely the "touch mark" of someone that worked on the gun ( to fix responsibility and insure payment for the work). There is no legend or listing of these marks, so the meaning is lost. This is a nice outfit.
Mike
Last edited by Der Ami; 11/03/20 06:55 PM.
