Aluminum flask of the Polish army M37. This flask model has a wide neck and was intended for storing water in it, as well as liquid food products in the form of porridge. It was allowed to wear the flask on a belt or attached to backpack. The strap is sewn specifically for wearing on the belt. Has a lot of stamps of the manufacturer, Year of issue - 1939. Used in the Polish army during the defensive battles at the beginning of the Second World War in September 1939. Very rare item in good condition, great for the collection.