Chiangmai Tok Lanna Kingdom

The tok was the primary silver currency of the Lanna Kingdom during its long period of Burmese suzerainty, which began after the fall of Chiang Mai in 1558 and lasted well over two centuries. These pieces were cast rather than struck — a production method that persisted in mainland Southeast Asia long after milled coinage had become standard elsewhere — resulting in the irregular surfaces and variable alloy homogeneity characteristic of the type. The .570 fineness reflects regional silver standards that diverged sharply from the purer alloys demanded by contemporaneous European trade coinage flooding the broader Asian market.