Another of today's coin finds. I believe it is a 1 cash coin from China. How do one date these? Is it look original or a fake? It is about 25mm in diameter.
The bumpy surface indicates this is a modern reproduction. It is imitating a Chinese cash of emperor Qianlong (also known as Ch’ien Lung or Kao Tsung), 1736-1795 AD, Boo Chiowan (Board of Revenue) mint, Beijing