Canvas Pouch ID Help - Light 1 G&S 6/43 57 IN

[peregrinvs]

Third time lucky: it's a haversack for the British 'Respirator, Anti-Gas, Light' that was introduced in 1943. That type of haversack saw use up until the 1970's. Later ones were made in a darker olive green colour. There's also a scarcer 'jungle' version made of different materials.