Below is a J.J.(Johann Jakob) Reeb Bonn sporting weapon, really a Belgian trade gun, with DUCO Stahl on the top rib and DUCO on the toplever.
DUCO Stahl
Amtlich Rauchlos Erprobt
For some reason the German proofhouse set the bar/tone for the other European proofhouses and evidently to defray doubt(& possibly advertising) the Belgian craftsmen applied several stamps with verbiage that noted smokeless proof.
amtlich vierfach geprueft und eingeschossen mit staerkster ladung rauchlosen pulvers
Kind Regards,
Raimey
rse
