Only around 5,000, "Final Model", Gallager patent carbines were produced by Richardson & Overman in Philadelphia in March-May 1865, chambered for the .56-52 Spencer cartridge. At least half of the original contract was sold as surplus and were purchased by the French for the Franco-Prussian War. This example has a pinched blade front sight, folding leaf rear sight, saddle ring and bar, a smooth oil finished walnut stock with iron patch box, and a crescent buttplate. The top of the barrel has a "R" inspection mark. The back action lock plate has the three-line Richardson & Overman address over the serial number just behind the hammer and the two-line Gallager patent marking on the lower part of the tail.