Only around 500 of the Model 1855 rifle-muskets were manufactured in .56 caliber with 31 5/16 barrels out of 9,310 military rifles manufactured in 1856-1864. It has a front sight that also acts as a bayonet lug for the included "US" and "B447" marked socket bayonet, two barrel bands, three leaf rear sight graduated for 100, 300 and 600 yards, sling swivels on the rear band and buttstock holding a black leather sling, "COL. COLT HARTFORD CT. U.S.A." in the top strap groove, "PATENTED SEPT. 10th 1850" in one cylinder flute, "COLT'S PATENT/+/Nov. 24th 1857" on the left side of the frame, matching visible serial numbers on the underside of the frame, lower tang and buttplate, and smooth stock and forearm with cleaning rod under the barrel and in the stock compartment. "GDM" (George D. Moller) collection initials marked at the toe of the stock. The bayonet comes with a leather scabbard and hanger. Provenance: The George Moller Collection