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  • Urkunden Prüfgebiet: Kanada

    Prüfer Art des Attestes Katalog KatalogNr.
    Gratton, Richard (AIEP (Association internationale des experts en philatélie)) Attest Scott 924 c
    Vincent Graves Greene, Philatelic Research Foundation (Prüferkommission) Attest Scott 936 a
    Vincent Graves Greene, Philatelic Research Foundation (Prüferkommission) Attest Scott C 3 c
    Scheller, Pascal (Sonstiges) Attest Stanley Gibbons II