Japan. Tokugawa Shogunate. Umibeshinden, Fukagawa. (1857-1859) Edo period, Masuashi Province. AE 4 Mon. (about 5g; about 28mm) 11 Waves Kan'eitsuho 寛 寶 通 永. Brass alloy, Ansei [Dark](65% Cu, 15% Zn, 20% Pb). Hartill#2.257-8. $14 each