In 1908, the M1904 haversack was reevaluated and the design slightly changed. The haversack, now designated as the M1908 was slightly smaller than the M1904. Also the two wire hooks on the back were replaced by two spring hooks.
This haversack, manufactured by the Rock Island Arsenal possibly in 1911, was issued to soldiers during World War I. The outer flap is marked with "4 E.", "PA." for Pennsylvania and "9". The inner flap (barely legible) is stamped "Rock Island Arsenal, 1911".