The grades of technician in the third, fourth and fifth grades were added by War Department Circular No 5, 8 January 1942. Change 1 to AR 600-35, dated 4 September 1942 added a letter "T" to the formerly prescribed chevrons for grades three, four and five.
The first sergeant was moved from the second grade to the first grade per Change 3, AR 600-35, dated 22 September 1942. This change described the first sergeant's chevron as three chevrons and arc of three bars, the upper bar of arc forming a tie to the lower chevron. In the angle between lower chevrons and upper bar, a hollow lozenge. This change also included the material as khaki chevrons, arcs, T and lozenge on dark blue cotton background or olive-drab wool chevrons, arcs, T and lozenge on a dark blue wool background.