James Boyd & Sons of Boston, Massachusetts, was one of the most important manufacturers of U.S. military leather accouterments during the mid-19th century. With the outbreak of the American Civil War in 1861, Boyd & Sons became one of the Union's principal contractors for leather military equipment. Alongside Emerson Gaylord, Henry Dingee, and John Pittman, the company furnished enormous quantities of regulation-pattern accouterments to both the U.S. Government and individual state governments. Their products were known for high-quality workmanship and were prominently stamped on the inside flap with the distinctive oval maker's mark: