Textbook M31 canteen marked OHW 40

Textbook M31 canteen which seems to be unissued and only shows some traces of storage and has been found as is! The only flaw on this canteen is that the felt cover has some moth damage. The flask itself is nicely marked OHW 40 which indicates production by Otto Honsel Werdohl in 1940. Excellent textbook M31 example which is a must have for every canteen collector!