Is it rifled or smoothbore double? Johann Niklaus von Dreyse, 1787 - 1867, was the inventor of the Zündnadelgewehr/needlefire and supplied some 60k examples to the Prussian army circa 1840. His son Franz von Dreyse was born in Sömmerda in 1819(some give 1822)(to 1894) and obtained a patent in 1874 for a convertible needlefire/centralfire system with Georg Kufahl in the mix with patents somehow. Rheinische Metallwaaren & Maschinenfabrik(RM&M) absorbed Waffenfabrik von Dreyse in 1901. The initials "CFW" might be for something like "CF" Waffenfabrik?

Kind Regards,

Raimey
rse