Tropical M31 canteen marked ESB 42

Excellent “tropical” M31 canteen with webbing straps. The aluminium flask itself, the strap and the cover are all nicely marked ESB 41 which indicates production by Eduard Sommerfeld, Berlin. In configuration with an excellent black urea resin (type of bakelite) cup marked gfc 1943. Stunning M31 canteen in very good condition with webbing straps!