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Urkunden Prüfgebiet: Kolumbien - Compagnia Colombiana de Navegacion Aérea
Prüfer Art des Attestes Katalog KatalogNr. The Philatelic Foundation, (Prüferkommission) Attest Scott C 10 Friedl Expert Committee, (Prüferkommission) Attest Scott C 10 Robineau, J. (Sonstiges) Attest Scott C 2 The Philatelic Foundation, (Prüferkommission) Attest Scott C 3 The Philatelic Foundation, (Prüferkommission) Attest Scott C 4 The Philatelic Foundation, (Prüferkommission) Attest Scott C 5 The Philatelic Foundation, (Prüferkommission) Attest Scott C 6 The Philatelic Foundation, (Prüferkommission) Attest Scott C 7