Having secured a number of bands and other furniture from Robbins & Lawrence contract for P1853 Enfield rifle-muskets, about 1859 Whitney developed a derivative of that arm that combined those bands with a 40 barrel in .58-caliber and rifled with 7-grooves that basically resembled the configuration of U.S. M1855 rifle-musket, a copy of which Whitney was also making. The 56" long rifle-musket that resulted was sold to state militia companies and two states: Maryland purchasing 2,000; and Georgia contracting for 1,700 (of which 1,225 were delivered). Although several components of furniture were from Robbins & Lawrence contract, nosecap was pewter (Enfield style), iron buttplate and brass trigger guard (bow/iron strap) were of a style peculiar to Whitney' Enfield series. Rear sight resembled ladder pattern of U.S. M1855 rifle-musket. Unique flat and unbeveled lockplate simply bears one line stamp "E. WHITNEY" forward of the hammer.