This kind of 2qt was the replacement for 2qt water bladder used in early 1960s.
The cover paired with a 1 inch strap, and it’s flap was in triangle shape on pre-1970 production (both shown canteen and cover are dated 1969).
Stock Number Reference:
|Canteen, Water, Collapsible, 2-Quart Capacity||8465-927-7484||1966-08-22|
|Cover, Water Canteen, 2-Quart, Collapsible (with Pile Lining)||8465-927-7485||1966-08-22|