Jas:
I would assume(remember don't assume) that it is a Belgian "knock-off", which they were well known for in the late 1800's and early 1900's. Theoretically speaking, one could have sent an arm to a proofhouse in Germany with charge and load specs(and appropriate funds) and if it survived, they would have stamped it. Actually, I believe it can be done today. The double may be a set of German barrels, an action from Bohemia and wood from Belgium. A photo will be reveal the answers.
Kind Regards,
Raimey
rse
