I can't decide between these two things, to buy next:

A rare WW1 French/Belgian OF.15 grenade (lemon grenade). I know it hasn't an igniter, but don't worry i've got one at home.
http://http://www.2dehands.be/verzam...-oorlog-marine

Or a German WW1 trench knife.
http://http://verzamelen.marktplaats...-dolk-mes.html

What would be your choice?

Thanks in advance.