I need some help about the material and some cleaning info about these badges I dug up.

[Snni]

Keep us updated!

[antymattar]

Well, I'm still trying to make sense of it because the material is too light to be zinc or bronze. It does not have the stuff that forms around silver when you leave it around for a long period of time(I always wondered why stuff like this had to be polished) and it is certainly not black. I can only think that this might be gold but I don't want to raise my hopes TOO high.

[Snni]

Its not Gold.. I think zink or tombak.

[Walkwolf]

Terrific finds, Varis !

I would go the preservation route. Do not over-clean or try to
polish them - it will remove what ever original finish is left.......

Could you post a few of the reverses and some close-ups of the nicer condition ones ?
It would be interesting to see what they really look like, and may give a better
idea of the metal they are made from !