Object 3635

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Collection 1907–1950s on leaves from UPU stock. Many better stamps incl. specimen stamps and very good back-of the-book material. The strong part is on the Genf-offices with many expensive and rare sets highly priced also as *. The difficult air mail ”Pro Aero 1938” Specimen in very good condition and also specimens with Postage Dues 28z-45z not priced! Some stuck to pages, mostly stamps without any value. Mostly very fine quality. Catalogue for * in SBK exceeds CHF 41.000 + 8 pages normal */(*) not counted.