¶ In view of the large and somewhat elaborate cap plates as well as shoulder-belt plates adopted by both the Regulars and Militia early in the 19th century, it is somewhat surprising that apparently neither component had ornamentation on its cartridge boxes until the Ordnance Regulations of 1834 prescribed a very ornate design embossed on the leather flap.[96] Certainly there was precedent for such, for both the British and German mercenary troops of the Revolution and the British and Canadian troops of the War of 1812 wore metal ornaments on their cartridge boxes. At least partial explanation for this omission may lie in one of Callender Irvine's reasons for rejecting brass cartridge boxes in favor of leather ones: "The leather ... affords no mark for the enemy to sight at. The brass ... would afford a central object, as regards the body of the Soldier, and one which would be seen at a great distance to fire at."[97] Why Irvine did not object equally to the large white and yellow metal cap and shoulder-belt plates as targets is unknown. In any case—with a possible few Militia exceptions such as a Militia cartridge box with a plate bearing the likeness of Washington in silver, both about 1835—the 1839 model oval plates were the first to be worn.
The ordnance regulations of 1839 and the ordnance manual of 1841 brought in two distinctly new types of plates, the familiar brass oval waist-belt and cartridge-box plates with the letters "U. S." and the round shoulder-belt plate with the eagle. The oval plates fall into two general sizes, 3.5 inches by 2.2 inches (for plates on the infantry's cartridge box and the cavalry's waist belts)[98] and 2.8 inches by 1.6 inches (for plates on the infantry's waist belts and the cavalry's carbine cartridge boxes and pistol cartridge boxes). The use of each plate is determined by the type of fastener. These plates were struck in thin brass and the backs generally leaded, although some were used without such backing, probably to save both weight and material. Cartridge boxes were also embossed with the outline of this oval plate in lieu of the plate itself. It is interesting to note that the larger plates with lead backs weighed about 5-1/2 ounces and the smaller ones just over 2 ounces.
WAIST-BELT PLATE, CAVALRY, 1839
USNM 604408 (S-K 555). Figures 88, 89.
Figure 88
Figure 89