M31 canteen with green painted cup marked HRE 42

Excellent M31 canteen in very good condition. The canteen is completely factory matching and most parts are marked HRE 42 which indicates production by Heinrich Ritter, Esslingen in 1942. This is a M31 canteen in configuration with a green painted aluminium cup as should have been the standard from 1941, in practice almost all manufactures still produced black painted cups. Rare example with green painted aluminium cup which would be hard to upgrade!