wooden canteen with leather straps, covered with fur and decorated with leather

wooden canteen with wood lid, lid has a crack across it but it still closes. The fur is intact as well as the leather and is in excellent shape otherwise.

fur feels like deer fur and seems to be glued flat on the wood. Straps are heavy leather and had side flaps. All decorations are layered with dark brown and burgundy leather.

Under side flaps there are stickers. Under one flap there is a handwritten E-43 and on the other one (see picture), there is writing that when I tried using translators it seems to be written in possibly Croatian, Bosnian,Serbian or Slovenian.