Silver double patard

Medieval Burgundian silver double patard. Recently found by Gary Foulger on or around Canvey Island. On the left as he found it on the right after it had been cleaned.

Silver double patard of Charles the Bold, Duke of Burgundy 1467-77, minted for Flanders. 1464-1544 the most frequently encountered foreign silver coin is the double patard of the Duchy of Burgundy, which was accepted as an equivalent of the English groat in Anglo-Burgundian negotiations in 1469. Hoards seem to indicate that double patards constituted at least 20 per cent of the groat currency by c.1500. The contribution of the double patard to the groat currency seems to have declined slightly after 1500, as new supplies of English groats were produced.