I can take all sorts of pictures, but don't have a clue as to how to post them...... the WK are stamped inside an oval, and the trailing edge of the W forms the leading edge of the K. The left side of the barrels just below the front claw mount are both marked BOHLER STAHL with a star stamped in between the two words. The WK inside an oval is stamped on the left side of the front barrel lug. On the left side of the rear lug is stamped 50. and in front of the front lug on the barrel underside is a lightly stamped 00 then a deeply stamped 37.
There is a crown over a "G"' a crown over a "U"', there are what appears to be a couple of birds spread eagled like they we're hit by a truck,
Then:
7m/m
57
3.37
540
several places where an N is stamped,
G.U.M.G 102gr
16 in a circle
16/1