A good example of a genuine issued Vietnam War era USMC (U.S. Marine Core) OG 107 cotton sateen P64 long sleeved utility shirt. It features the USMC ink markings to left chest, the shirt has a pen pocket and domed plastic buttons. Missing size label, retains the manufactures label, has a DSA (Defense Supply Agency) contract number dated 1969, made by Guy H James Ind Inc.  

Additional size information: Armpit to armpit 22" (up to 44" chest). Armpit to cuff: 21". Shoulder to shoulder: 17". Collar 16".