OPPELN, 5 Mark dark orange horizontal pair Numeral design 1920, 1 Mark red-carmine, 2 Mark dark brown (front), 80 Pfg lilac-brown (reverse), Steelworks and Dove of Peace 1920 on insured letter (declared value 12000 Mark) to Eisenberg / Thuringia, parcel single-line Z1 OPPELN (OS handbook No. 18) and double-circle OPPELN 28 6 21 * (OBERSCHL) f (OS handbook No. 237.18), arrival (30.4.1921) on reverse, wax seals on reverse removed, otherwise age and use marks typical of period