build as a combination gun with a rear set trigger for the right barrel than changed by "M. OGRIS FERLACH" into a 20 ga double gun and proofed there in 1937 this SN 4400 is without german proof so probably made before 1891/1893

http://www.dorotheum.com/auktionen/aukti...lach.html?img=1

single shot gun with straight rifling, 12,5mm - proably 32 ga.
proofed after 1893

http://www.dorotheum.com/auktionen/aukti...oder.html?img=2