1 Cash - Cảnh Hưng Tống Bảo, Sỉu

Cảnh Hưng was the reign title of Lê Hiển Tông, who ruled nominally for 46 years while actual power rested with the Trịnh lords in the north. The cash coinage issued under his title was produced in enormous variety — Toda catalogued well over a hundred distinct types bearing the Cảnh Hưng inscription, more than any other Vietnamese reign. This proliferation reflected not imperial ambition but fiscal desperation, as the Trịnh administration repeatedly debased and diversified the cash supply to manage chronic revenue shortfalls.

Toda #83 with the reverse reading Sỉu places this piece among the auxiliary mark varieties used to distinguish output from specific casting runs or supervisory batches.