1721-1724, Japan, Koshu Province. Gold Shin Koshu Ichi Bu Kin Coin Mint Period: 1721-1724 Region: Koshu (Kai) Province, JapanDenomination: Shin Koshu Ichibu-kin (1 Bu)References: Friedberg 40, JNDA 9-87, KM-94.Diameter: 16mm Weight: 3.71gm Material: Gold!Obverse: Paulownia flower and three Hanji characters.Reverse: Two Hanji characters.Koshu-kin (Koshu Gold) was Japan’s first systemat ...