I have some question about this nice Wild-Pig-Head shown below,



The weight is about 1,8kg!, with an 925 Mark and halfmoon crown.
I also have two cups with the same pig-head on them.
I have found the Mark [EH] (letters EH in an square) on them.
1. How can i use it?
2. Where does it come from?
3. How old can it be?
Thanks for all your help!