Congratulations on a beautiful rifle in like-new condition.
The barrels look to be modern steel and if so, you may well be able to use modern smokeless powders in the rifle.
The action strongly resembles that of my coin finish Simson Suhl with the exception that the Simson has cocking indicators.

There may be information to be had by also placing this post on the German Gun Collectors site http://germanguns.com/ .

Enjoy it and let us know how it shoots!


NRA Patron, TSRA, Whittington Center, DWWC,DRSS
Reloading Ballistics App at http://www.xplat.net/