German Drilling-When Made?

[BarkeyVA]

I recently acquired a 16 ga. over 9.5x72R German drilling. Gotthilf v. Nordheim and Krupp stahl on the barrels with claw type scope mounts. Very hard to see proof marks and doubt if they would show up in a photo. I can make out the numbers 118,35; 6,07; and 1007 stamped on the underside of the barrels. There is the number 25 stamped on the side of the forearm lug on the bottom of the barrels and and on the top ledge of the frame. I'd like to know when it might have been made plus any other information about it.

[BarkeyVA]

Some more photos showing markings on the frame and underside of the barrels. Also, the following is stamped on the side of both barrels: 2gr. Sch.P and 28.3 gr. Bl

[BarkeyVA]

Three more photos with markings on the frame and barrels:

[mike ford]

See the discussion of this gun on the Doublegun Forum.
Mike