GROSS-STREHLITZ, 1 Mark red-carmine, 3 Mark dark violet Steelworks and Dove of Peace 1920 on letter card from member of French troop contingent in OS to Boulogne-sur-Seine / France, double-circle GROSS-STREHLITZ 25 1 22 * * c (OS handbook No. 112.6), arrival (28.1.22) on reverse, interesting early inflation-period document, very neat strikes, good condition