I picked this up a couple of years ago. It is an Australian WW2 Wooden Ammunition Box, but i have not been able to identify its contents.
Here are some details from the box.
On the face of the box is
NO.37 NO.13 MK II
GAUGE CLEARANCE FIRING
It has SCW 11 1944 stamped into the base of it on the side.
It has a rather large Metal latch on the front of it and a Leather strap going across the box.