A genuine U.S. Army Vietnam War era M1961 Field Pack also known as a 'Butt Pack' due to its location when used. Very good condition, top plastic ID holder is in good shape with slide keepers/Alice clips to the back, DSA (Defense Agency) contract marks and dated 1969. Similar to the M1956 field pack with addition to being slightly larger and having a rubberized throat lining. It's made from OD7 duck cotton and features a small carry handle, side webbing plus a row of eyelets to for attaching hook gear like machete sheath or bayonet scabbard.