Korea 1892 5 Yang. This is technically the only large silver crown that you can get hold of in the whole Korean history before Korea broke up. There is one crown after this, which is 1 Hwan, but most of them were melted down and only 77 survived, hence making this coin extremely scarce, as there are just around 20,000 of these coins. Ex-jewellery. Weight: 26.79g