Pretty sure that box is for an L.F.H 18 ( Light Field Howitzer) power charge, or the round itself. I have one that is dated 1939, but mine is a dark green and has stenciled markings on the lid. I've never seen one that was "camo" but that doesn't mean they didn't exist. You should look around on the inside of the lid, and on the lower outside corners of the box, that is where there should be some "stamped into the wood" waffen ampt markings, and or a date. Mine is dated 1939 on the outside on one of the end portions of the box.