Federal Forage Cap w/ V Corps Badge and Unit Insignia, worn by an unknown member of Co. K, 129th Pa. Vol. Infantry, a unit that saw nine-months service with the Army of the Potomac. The crown is decorated with a hand cut V Corps badge upon which is affixed a small stippled numeral "5" and, in the center, a silver metal eagle. Below the badge is a 1" brass letter "K" and ¾" numerals "129." The cloth badge is blue in color of the 3rd division.