Manufactured circa 1870s with a total quantity estimated at 2000. Top barrel flat marked "XL DERRINGER" and "PAT. APR. 5, 1870" on the upper left flat. Although the derringer does not bear Hopkins and Allen markings, it does appear in their advertising literature. The patent date is for the Marlin Ejector used on the derringer and for which a royalty was likely paid to Marlin. Iron frame and fitted with bird head grips. Nickel finished and casehardened hammer and trigger.

Manufactured from 1863 to 1867. Two line New Haven barrel address on a barrel correctly manufactured without sights. Fitted with smooth bird head grips.