Finally got around to trying to research two guns I inherited from a family friend. One is a German drilling in 9x57R and the other is a drilling side by side 16 gauges barrels with a rifle barrel in 6.5x70R below. I'm pretty sure these were returned to the US after WW2. I can't find a manufacturer or year of manufacturing. Could use help deciphering the proof marks
Thanks, Jim
Not sure I'm inserting photos correctly. The last three photos showing proof marks are for the drilling

[img:center]https://photos.app.goo.gl/Atq9jyUtDT6offJN8[/img]