1891, UPU CONGRESS VIENNA, cover with sender's imprint "Congres postal universel de Vienne" and rare registration label "Weltpost-Congress Wien", bearing 30 kr. oblit with special event postmark 27.6.91, adressed to Monsieur A.Doursoun British Post Office Constantinople. Rare item in good condition! (Tax Method: Margin System)

1897, UNIVERSAL POSTAL CONGRESS, overprints on 1 c. to 5 $ Definitives, 10 c. Special Delivery, 1 c. to 50 c. Postage due and 1 c. to 100 $ Newspaper Stamps, 35 values mint o.g., few imperfections. Rare set! (Tax Method: Margin System)

1897, USA, "UNIVERSAL POASTAL CONGRESS", overprint on 4 stationery cards: 1 c. black, 2 c. blue and reply cards 1 c. black and 2 c. blue, onte item few marks, otherwise very fresh. (Tax Method: Margin System)

1897, UPU CONGRESS WASHINGTON, 2 entires with clear strikes of machine special event postmarks, very good condition. (Tax Method: Margin System)

1934, UPU CONGRESS CAIRO, 3 entires to the Netherlands with clear strikes of special event postmark, incl. one registered cover with corresponding sender's imprint and franking, stamps oblit. with smaller type in black, larger type in violet (2) resp. black (1) alongside, one cover with slight toning spots. (M) (Tax Method: Margin System)

1938, "COMMISSION PREPARATOIRE U.P.U. OTTAWA JUIN 28 1933", special cancellation, 2 clear strikes on cover with sender's imprint on reverse and cachet of front, adressed to Bern/Switzerland; in addition letter of Post Office Department with announcement of the usage of the special cancellation and 2 proof strikes of it (dated JUIN 27), very good condition. (M) (Tax Method: Margin System)

1929, UPU CONGRESS LONDON, registration label, complete sheet of 50 (nos. 201-250), mainly unmounted mint, some hinge perforations/imperfection at base, otherwise very fresh condition. Very rare and attractive! (M) (Tax Method: Margin System)

1891/1984, collection of more than 150 entires, neatly collected in 4 albums, comprising a good range of interesting items incl. early pieces like Vienna 1891, Stockholm 1924, London 1929, also nice section service mail and meters; in addition many presentation folders and some stamps of Geneva office. (K) (Tax Method: Margin System)

Ab 1894, Partie mit 45 Briefen und Karten (meist modern) mit interessanten Stempeln, Postkrieg, Kongressen....etc, nette Ergänzung für die Sammlung. (T) (Tax Method: Margin System)

1897, USA, "UNIVERSAL POSTAL CONGRESS", overprint on 59 different stationery envelopes (1890/95 issues), very fresh condition. (A) (Tax Method: Margin System)

1906, Vorlageblock "TIMBRES-POSTE POUR LE SERVICE INTERNATIONAL", anläßlich des UPU-Kongresses in Bern 1906, dargestellt werden die UPU-Farben grün/rot/blau anhand von 3 Marken 5 C., 10 C. und 25 C., Entwerfer "J. Sigismond", nummeriert 898 von 1000 und signiert, kl. Spuren. (Tax Method: Margin System)

1949, MONACO, 75 Jahre Weltpostverein (UPU) kompl. Satz in zwei ungezähnten SONDERBLOCKS auf dicken ungummierten Papier (Tax Method: Margin System)