Blanc with nine ermines - Jean IV - Duchy of Brittany

The Blanc with nine ermines - Jean IV - Duchy of Brittany is a distinguished medieval coin from Duchy of Brittany (French States) (1380–1389), denomination 1 Blanc,. Minted during an era defined by feudal hierarchies, cathedral building, and the clash of kingdoms, medieval coinage reflects both the aspirations and the constraints of its age — often crude in execution yet rich in symbolic imagery. Cast in the medieval period, this coin comes from an age when monetary systems were fragmented across hundreds of competing minting authorities. Kingdoms, principalities, free cities, ecclesiastical establishments, and great noble houses all maintained the right to strike coin — a situation that resulted in bewildering monetary complexity and rich numismatic diversity. The study of medieval coinage intersects directly with political history, economic history, and art history. Struck in billon — a debased silver alloy with a low silver content — this coin reflects the economic pressures that frequently led governments to dilute their coinage with base metal. Billon coins occupy a fascinating transitional position in monetary history, their very composition serving as evidence of fiscal stress, debasement cycles, and the tension between monetary ideals and governmental financial needs. For collectors and investors, this coin represents an opportunity to own a tangible piece of monetary and artistic heritage. When evaluating any example, condition is paramount: third-party grading by NGC (Numismatic Guaranty Company) or PCGS (Professional Coin Grading Service) provides an objective assessment and significantly enhances liquidity. Proper storage in acid-free holders, away from humidity and direct light, will preserve the coin's surfaces for future generations.