The Ansei Koban gold coin is a koban gold coin with a very short mintage period, cast in 1859 (Ansei 6). This is a replica, but it seems to be quite rare. - Material: Unknown (Brass?) - Design: Engraved pattern - Markings: Positive stamp on the upper right of the back. - Weight: Approximately 12.2g - Dimensions: Approximately 72mm x 39mm x 0.6mm This is just a replica, but please add this very popular koban gold coin to your collection for good luck with money!! As this is a used item, there are some minor scratches in places, so please refrain from purchasing if you are concerned about this. Thank you for viewing.