MMmm, LOOKs like the box is home made to Me as well. The Original Labels were DARK Black Printed ones. This label has been done on a Typewriter. Also, if you look carefully, the internal section walls. Do Not all come up to the same height & there are gaps between the joins. These were finished off on a sanding machine & were uniform in appearance.
AND, they WERE uniformly paint sprayed inside. A Sateen Green colour that was smooth.
This 'Example' is left in the natural colour wood state. I have NEVER seen this in BritishService Examples!
They were also manufactured from Hardwood. THIS example appears in a different wood to the an original. This one LOOKs like it's pine from the photo. But I may be wrong of course! The wood grain APPEARS wide & coarse. Hardwood originals grain, were so close. You couldn't really see any grain. But it is a few years since I looked at one close up!............
Also, IIRC, I THINK they had metal edge corner protectors fitted? Also, I THINK the screws for the hinges were slotted head. NOT Crosshead Versions. Just My Thoughts on this!..............