Antique U.S. military Model 1903 infantry cartridge belt manufactured by Mills, designed for carrying .30 caliber rifle ammunition, including .30-40 Krag and early .30-06 Springfield cartridges. Constructed of heavy khaki/olive-drab woven canvas with 50 double cartridge loops, providing individual retention for up to 100 rounds. Features the distinctive Mills woven construction, metal cartridge belt fasteners, adjustable waist sizing, and metal eyelets. The fastening hardware is marked "MILLS PATENTS" and "MADE UNDER MILLS," with the Mills cartridge logo. A collectible example of early U.S. military infantry equipment from the pre-World War I era.