Ming Dynasty - Ryukyu Kingdom. Da Shi Tong Bao, 1454-1460, AE Cash (3.7 g, 24.2 mm). Issued during the reign of Sho Taikyo. The format of the Ryukyu coins followed the Ming style. Nice old time toning. Very Good.The kingdom of Ryukyu, today known as Okinawa, was a vassal state of Ming dynasty. The c