The kingdom of Lanna in the North of today's Thailand was founded in the 13th century and soon developed an elaborate coinage system. It consisted of little silver ingots in various shapes. In the 17th century, tok money was introduced. Its characteristic was that the tok coins were always domed on one side. They came in different forms – this piece is called tok Chiang Mai, since it derives from the town of Chiang Mai in the north of Lanna. Tok Chiang Mai has a flat and yellowish-brown bottom, while the domed upper side is blackish, and sometimes, as on this piece, stamped.