This is a large metal ball of some sort. Etched and engraved with the place names of where a soldier has been during WWII. It is dated 1945.
I can find no other information even after sending pics to a trench art expert, he was stumped also. I am submitting pics of the piece and of the hallmarks. The halmark appears to be double struck so is rather hard to see. It clearly says Den Haag but I can't figure out the rest.

