Double tournois - John III SIGNUM DEI VIVI

John III of Brittany died in April 1341 without a legitimate heir, triggering the War of Breton Succession — one of the more destructive regional conflicts of the Hundred Years' War period. This issue dates to the final months of his reign. The SIGNUM DEI VIVI inscription, unusual for a feudal double tournois, reflects a deliberate ecclesiastical posturing at a moment when John was maneuvering politically against rival claimants and attempting to assert the legitimacy of his authority through religious invocation rather than dynastic strength.