Description
75th anniversary UPU set of 3 40g, 60g, 1s (SG 1175–1177) on special mini-sheet for the 100th year of the UPU, on 1st flight Vienna–Budapest “Aerofila 74”; plus UPU Centenary (SG 1719–20) & 1s definitive; registered; b/s 24 October 1974 Budapest; a curious mixture