WW2 wooden ammunition box

Here i have a wooden ammo box..
This was found in a building in the countryside
It looks to have had alot of use and of course is empty..
It has markings on each side... i have not a clue what they mean..
Hinge and lock piece work well but could do with a little oil to keep it loose
Other than that its all i really know...
So any questions please ask away..