New Year's Sale! This is a rare replica Koban gold coin from Sado. Genuine ones are scarce and rarely found, and the period of casting is unknown. (From the Japan Numismatic Dealers Association materials) - Material: Unknown (Possibly brass?) - Weight: Approximately 12.2g - Dimensions: Approximately 72mm x Approximately 39mm x Approximately 0.6mm - Features: "佐" (Sa) mark on the back (Measurements are amateur measurements using a commercially available measuring device, so please allow for some error.) There are slight scratches and black stains on the back. Please check the photos. Please refrain from purchasing if you are sensitive to these imperfections or if you are seeking perfection. Although it is a replica, it's perfect for your gold luck collection, which is very popular these days!! Thank you for viewing.