UNIT MARK OF FRENCH TROOP CONTINGENT IN UPPER SILESIA, 15 Mark grey-violet Steelworks and Dove of Peace 1920 on black-and-white picture postcard, double-circle GLEIWITTZ 25 5 2... * 2 ..., more precise identification impossible, violet double-circle unit mark HOSPITAL MILITAIRE DE GLEIWITZ - LE MEDECIN-CHEF (= Gleiwitz Military Hospital - Chief Physician) (OS handbook no. FFr), good condition