Vietnam War era US M1961 Field Pack

Vietnam War era US M1961 Field Pack. Olive drab canvas with clear US stamp on the front flap. Features metal buckles, grommets, and rear attachment hooks for suspender gear. Marked with contract number showing what I think is a 1966 manufacture. Shows light use and storage wear but is in solid, serviceable condition. Someone marked it “Chief” on the carry handle. A classic piece of mid-60s combat gear, ideal for Vietnam US Army or USMC impressions, displays, or as a collector’s piece.