CIRCA 1910-1937, U.S. AND UNITED STATES NATIONAL ARMY, USNA, COLLAR DISKS TYPE I, ENLISTED, U.S. ARMY Grouping consists of a U.S. Collar Disk and an USNA, Collar Disk, Both are Type I, Enlisted. Both thumb screws are intact. Measures approx. one inch in diameter. Screw backs. On October 8, 1907 the War Department issued Circular No. 68 that described new insignia to be worn on the standing collars of enlisted men's service uniforms. These were to have been two pairs of one inch bronze disks. On each side of the collar there was a pair, one bearing the letters U.S. and the other the branch of service. The insignia were attached by a threaded post and thumb screw nut. Older enlisted insignia that were in use were cut out emblems of the service branch similar to officer's collar insignia. The edges of the cut out insignia snagged on brush and the insignia came loose. The pins frequently broke on these and it was hoped that these new disks would be nearly indestructible. A second circular No. 78 of November 17, 1909 delayed the implementation to July 1, 1910. Not long afterward the decision was made that each soldier would wear a total of two disks rather than four with the right one being the U.S. and the left one being the branch. Certain of the disks included the regiment number and company letter on the face. The earliest of these disks are referred to as Type I disks. This type was in use from 1910-1924 and was the type used during the First World War. They have a background pattern that was plain or may be dots. The plain block US was the original and basic right sided collar insignia. It was used by the Regular Army during the entire period. The distinction between Type I and Type II disks is minor and is one made by collectors rather than the military. Type I and Type II disks continued in use until the advent of the Type III disk and likely were issued until stocks of them were exhausted after 1937, which was the usual practice by the Army. Type II disks were also one piece screw post disks but have a more intricate background pattern than the Type I disk. The pattern consists of a series of diagonal cross hatched lines with a pattern of shields or acorns in the squares formed by the lines. This background pattern was established as the sole official one by Army Regulations AR 600-35 of December 31, 1926 but existed as a manufacturers variation prior to that time. Prior to 1926 at least six different background types were in use and Type II background appear on disks dated to 1919 according to Albert Scipio. The regulations issued on December 31, 1926 also abolished the standing collar and introduced a label, rolled collar coat. The collar disks were then worn on the upper collar of the coat's lapels. There are also a few disks with a Type II background produced that were two piece with a branch device that could be removed for cleaning similar to the Type III disks that would follow. Reference: ?The Collar Disk Story (1907-1999), L. Albert Scipio II? International Buyers Please Note: We do not ship outside of the United States! No Exceptions. In addition, we will not ship to third party shippers or any other international shipping hubs such as International Shipping (EIS), EIS 110 INTERNATIONALE BLVD, GLENDALE HEIGHTS IL 60139-2080, or ACI Express Shipping. No buying agents such as Intercommerce America. No international buyers, no freight forwarding companies, no gift addresses, no non U.S. citizen buyers, and no non U.S. based forms of payment. If you place a bid, or make a purchase, we will cancel your bid, and or cancel your purchase! If you wish to make a purchase, you will have to find someone located within the United States to make the purchase for you. They would be responsible to send the package to you. We do ship to APO and FPO addresses.