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  • Urkunden Prüfgebiet: USA (Unions-Ausgaben ab 1847)

    Prüfer Art des Attestes Katalog KatalogNr.
    The Philatelic Foundation, (Prüferkommission) Attest Scott C 23 c
    PSAG (Philatelic Stamp, Authetication and Grading) (Prüferkommission) Attest Scott C 6
    The Philatelic Foundation, (Prüferkommission) Attest Scott C 6
    PSAG (Philatelic Stamp, Authetication and Grading) (Prüferkommission) Attest Scott C 6
    The Philatelic Foundation, (Prüferkommission) Attest Scott E 3
    PSAG (Philatelic Stamp, Authetication and Grading) (Prüferkommission) Attest Scott E 3
    Crowe, William T. (Sonstiges) Attest Scott J60
    The Philatelic Foundation, (Prüferkommission) Attest Scott R 133