I am a new member to coin talk.
I have acquired a lot of old chinese coins, my first,that I have no way of identifying. Can any of you recommend a good reference? I believe some of the coins are rather old as they are very thin and blank on the reverse. There are also a few charms too.Most of the coins are in such poor condition that it is
hard to make out anything. Can you recommend a way to clean them without damage? Are they copper, bronze or some other material? Thanks in advance. I may be able to scan some of the better ones, if I can figure out how to do it.