Japan. Tokugawa Shogunate. Asahusa. (1821-1825) Edo period, Masuashi Province. AE 4 Mon. (about 5g; about 28mm) 11 Waves Kan'eitsuho 寛 寶 通 永. Brass alloy, Bunsei [Red](75% Cu, 15% Zn, 10% Pb). Hartill#2.254-5. $14 each