Rare pre war SS issue M31 canteen RZM 497 38/SS

Very rare pre war SS issue M31 pattern canteen in overall good condition. All the parts of the canteen (cap, cover and the flask itself) are nicely marked RZM 497 38/SS which indicates manufacturing for issue to the SS in 1938. Sadly the canteen is missing its cup and the strap has been period shortened a bit. These SS issue canteens are extremely hard to find and this is a must have for a specialized canteen or early SS collector!