US Army Technical Sergeant rank insignia, in use 1942-1955 (colour change in 1942 to these colours, rank discontinued in 1955)
Derived from w:Image:US_Army_E-7.svg with colour changes per w:Image:WWIITSGT.gif. Authoritative reference: http://www.tioh.hqda.pentagon.mil/Rank_page/History_of_Enlisted_Ranks.htm