Double Parisis - Charles Nantes, KKAROLLUS DVX

Charles de Blois struck this issue during his contested tenure as Duke of Brittany, a claim he held against the rival house of Montfort throughout the War of Breton Succession. That conflict, which had burned since 1341, was nearing its conclusion — Charles would be killed at the Battle of Auray just four years later in 1364, ending his faction's claim entirely. Billon coinage of this type was produced under severe monetary pressure, with both sides in the succession dispute minting independently to pay troops and assert ducal legitimacy through the currency itself.