Japanese Gold Cho Gin? | Brass Replica

Judging from the pics of the first post and this one, it looks like a brass copy.
The color in the first post would have been more correct. The fact that it came off is very telling, as these would have been solid rather than gilded.
The metal does not really look like gold, especially gold after a cleaning. It's much too dull. Anyhow, I think making a gold replica of a silver coin kind of defeats the purpose of making a replica.