Gold Ecu - Mary of Brabant Oyen

Reinald III, Duke of Guelders, spent much of his later reign imprisoned by his own brother Edward, who ruled in his place from 1361 until Reinald's death in 1371. The "Mary of Brabant" attribution in the Oyen coinage refers to the broader Franco-Flemish ecu tradition rather than a personal commission — Guelders adopted the French ecu format aggressively during this period as a deliberate tool for cross-border mercantile credibility in the lower Rhine trade networks.

The Delmonte G#246 classification places this among the rarer documented Guelders gold issues of the fourteenth century.