Old Asian coin (Chinese mayber?) ID value and date needed

Hello This coin weighs 3.3 grams and is slightly wider then a Jefferson nickel but perhaps ½ as thin. Value, date (approx.?) and ID needed. Thanks in advace! Appears to be brass or bronze! or gold??  

An evocation of this coin

N#19923

This is not a coin, but too fancy to be a flea market type imitation or play money.    Call it a charm.