RATIBOR, 10 Pfg dark orange-red Steelworks and Dove 1920, 1 Mark rose-lilac Plebiscite of 20 March 1921 on registered cover to Uedesheim a. Rh., RATIBOR 20 3 21 * * b (OS handbook No. 274.3), arrival mark (22.3.1921) on reverse, very neat postmark strikes, two adhesions on reverse, photo certificate Gruber BPP (2009).