30 Pfg yellow-orange left marginal example Steelworks and Dove 1920, 60 Pfg Prussian blue Plebiscite on 20 March 1921, on registered letter to Uedesheim a. Rh., RATIBOR 20 3 21 * * b (OS handbook no. 274.3), arrival (22.3.1921) on reverse, very neat strikes, two adhesion spots on reverse, Gruber BPP photo certificate (2009)