YP546: Czechslovakia - 1974: 20k
YP547: Czechslovakia - 1975: 40k
YP548: Czechslovakia - 1975: 25k
YP549: Czechslovakia - 1973: 55k
YP550: Czechslovakia - 1972: 15k
YP551: Czechslovakia - 1972 (In đè): 220k
YP552: Tristan da Cunha - 1984 (khối 4): 560k
YP553: Papua New Guinea - 2005 (khối 4): 380k
YP554: FDC thực gửi - Estonia - 2015 (địa chỉ bị che): 190k
