I am looking for some information on a gun I have. The caliber is 8x57. It says " Gewehrfabrik Danzig" on the receiver left wall along with a 3 digit serial number. There is also a proof mark on the left of the serial number.

Did the German arsenal Danzig make any sporters or did they make only military rifles ?, If Danzig did not make sporters, who could have made this rifle.

It has a 3 digit 9xx serial number, is it possible to get an idea when it was made?

Thanks
Herb