50 Pfg dark grey Steelworks and Dove 1920, 40 Pfg green-olive upper right sheet corner 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