Approximately 100 to 150 of these rifles were manufactured by Rufus Nichols and Edward Childs of Conway, Massachusetts, around the late 1830s. The design was patented on April 24, 1838. These are very rarely seen. This rifle has the "lacy patch box" shown in the "Flayderman's Guide" entry and is the variation without a loading lever and with the internal mechanism. It has asterisks around the muzzle, a dovetailed blade front sight, adjustable sporting rear sight with long tang, German silver furniture, a plain rectangular inlay on the shallow cheekpiece, and no visible markings.