Interesting wooden box- British?

[bombdoc]

I don't think this is a UK ammunition box..

1. Wrong base colour, should be brown not green.
2. Designation wrong.. should be something like Cart SA .303 AP MK X in yellow.
3. Style of stencil wrong.. looks Russian.
4. No batch numbers or manufacturer code.
5. No hazard label.

The box has some internal fitting pieces which do not look like ammunition ones.. I would guess it was for a bit of equipment such as a tripod or similar..