Usually I can track down most Asian coins through trial and error here on numista, but this one is a stumper, and doesn't appear to be on numista? The center hole must have been punched out off center more than one time:
~0.84g,
19mm,
Looks brass…


May need to be added to the catalog if not here already… It could also be some kind of charm-like token perhaps?
Bumped…