Henry Derringer Copy by Andrew Wurfflein. Nice copy of a Henry Deringer made by Andrew Wurfflein. Mr. Wurfflein was a gunsmith in Philadelphia from 1845-1871. This is a very nice sharp copy. Barrel is 2 3/8”, and the total length is just about 6”.This gun is in .41 caliber and has a silver banded barrel. Both barrel and lock are “A. Wurfflein” marked. The hammer and lock are nicely engraved, but the rest of the German silver inlays are not engraved which is common with Wurffleins. Action works perfect. Very nice Deringer copy by Wurfflein!