It has been lacquered by the vet to protect the paint from peeling (most of the ones you find are missing all the paint, as Chinese paint wasn't the best). It appears to be a copy of the Japanese canteen from WWII.
Harness is sound and in good condition. The item "Korean War Bringback Chinese PVA Canteen" is in sale since Monday, May 6, 2019. This item is in the category "Collectibles\Militaria\Korea (1950-53)\Original Period Items". The seller is "sapper1991" and is located in Vincent, Ohio. This item can be shipped to United States.