Tanzania 1987 Queen's 60th Birthday set of 4 perforated proofs in blue & black only (as SG 517-20) unmounted mint
Tanzania 1987 Queen's 60th Birthday set of 4 perforated proofs in blue & black only (as SG 517-20) unmounted mint
Tanzania 1987 Queen's 60th Birthday set of 4 perforated proofs in blue & black only (as SG 517-20) unmounted mint