50 Centimes - Fort du Murier

Fort du Murier was a prisoner-of-war holding facility in France during the First World War, and like many such camps, it issued its own internal scrip to manage prisoner commerce without circulating official French currency inside the wire. These camp-issue notes exist in a narrow administrative gap — not quite money, not quite token — and the 50 centimes denomination covered the most routine canteen transactions.

Grey paper was a common expedient for camp issues; durable enough, cheap, and distinct from anything a prisoner might already possess.