You guys have been just terrific. Thank you so much for your help finding out the history of this drilling.
I was checking through German town names that end in "MBERG" and I didn't really find that many. I would think a gun of this detail and quality would be sold out of a larger city instead of a small village, further limiting the options.
Would Nuremberg be a likely origin? Bamberg?
Incidentally, I looked at the 2nd word with a 10x jeweler's loop and it definitely says "C. LEBxxxx". The third word's letter preceding the MBERG could be an A but there is only 5% of the letter remaining.
Can we limit the possible locations of the manufacturer based on where the gun was ultimately proofed? (I assume guns were proofed at the nearest government office?)