The size tag on this is faded and in general it is hard to make out any of the markings as they are all printed on. Please reference pictures. However from clothing analysis the buttons are from SCOVILL MFG CO. And the zipper is a CROWN zipper. Both of these aged to be in the 50s-60s era.

The M-1951 field jacket was a U.S. Army four pocket jacket made of 9-ounce wind resistant, water repellent treated cotton sateen cloth in Olive Green Shade 107 (OG 107).[1] It was redesignated as the M-1951 field coat in November 1956.

This antique US Army M-1951 Field Jacket from the Vietnam War era is a rare find for any militaria collector. The jacket features a Vietnam conflict patch and is an original piece from the 50s-70s. The jacket was made in Vietnam and is a great addition to any collection of original period items. The jacket is in great shape and has been well-preserved over the years. It's a must-have for any collector of Vietnam War memorabilia.