The Hoei Koban gold coin is a relatively famous koban gold coin that was minted between Hoei 7 and Shotoku 4 (1710-1714). (From the Japan Coin Dealers Cooperative Association materials) - Material: Unknown (Brass?) - Weight: Approximately 12.2g - Dimensions: Approximately 72mm x Approximately 39mm x Approximately 0.6mm (Measured by an amateur with a commercially available measuring instrument, so please allow for some error.) Speaking of the Hoei era, there was the Great Hoei eruption of Mount Fuji! There are no noticeable scratches or stains, but as it is a stored item, please refrain from purchasing if you are nervous. It is only a replica, but please add it to your collection as a very popular good luck charm for financial fortune!! Thank you for viewing.