.52 caliber rifled bore with .58 chamber, 21" barrel. Top of breech marked US/S. North/Middltn/Conn/1852. Breech marked "STEEL", left flat with J.H. inspection. Walnut stock. Known as the "Freemont Hall", one of 5,000 M-1842 Hall carbines sold as surplus by the New York Arsenal in August of 1861 to arms speculators backed by J.P. Morgan for $3.50 each and "modified" for use of .58 caliber ammunition by enlarging the chamber to approximately .58 and rifling the barrel, but leaving it in the original .52 caliber! The guns were subsequently sold to General John C. Fremont's command in St. Louis for $22, resulting in Congressional investigation into what became known as the "Hall Carbine Affair." A scarce example of a historically important Civil War used carbine.
About very good. Metal with clear markings throughout, and a smooth pewter patina with some lightly scattered age staining and minor surface oxidation. Mechanically functional, bore very good, with crisp rifling. Stock with bumps and dings and a light coat of old varnish. Faint WAT cartouche visible on right flat, behind receiver.