An excellent example of a genuine issued Vietnam War era OG 107 cotton sateen P64 long sleeved utility shirt. It has a U.S. Army tab to chest, the shirt has a pen pocket and domed plastic buttons. With size label to top, bottom label has a DSA (Defense Supply Agency) contract number with a 1973 manufacture date and was originally made by Choctaw Manufacturing Co Inc.
Additional size information: Armpit to armpit 21" (up to 42" chest). Armpit to Cuff: 19½". Shoulder to shoulder: 15½". Collar 14½".