British made canteen cover?

[denfly]

I have this unusual cover with 6 stitches on front with the US printed a bit higher than normal with a small patch for the hanger. My first thought was British made but perhaps an Asian version, (China, Korea, Japan)? The canvas is tough and has the brass hardware but still appears odd.

[denfly]

Here are more pics with a canteen and cup inserted. Note near the flaps how it "stands outstiff". The rear, side and the inner lining. Bottom has a stitch across.