FRANCE / AVIATION ANNIVERSARY : VOL SPECIAL COMMEMORATIF PARIS / TOULOUSE / MURET à l' occasion de CINQUANTENAIRE du 1er VOL MECANIQUE à Satory le 14 octobre 1897 par Clément ADER et de l' exposition nationale, des AILES BRISEES, de souvenirs aéronautiques et de poste aérienne à Paris Musée Galliera du 13 novembre au 1er décembre 1947 - affranchissement à six francs et OBLITERATION SPECIALE du 13 novembre 1947 illustrée de la chauve souris symbolisant l' avion EOLE d' Ader. - Traveling envelope, numbered, addressed to the PTT receiver in Muret (31). VERSO: special thirty-franc vignette for payment of airmail surcharge. Serrated vignette, 30 x 52 mm, intaglio printing in blue, drawings by Louis, engraving by Cortot, portrait of Clément ADER and his plane + CAD arrival Muret 14-11.

Composed of several subsidiaries, the Drouot Group is a major player in the art market. Hôtel Drouot, located in the heart of Paris, has been the world's largest public auction center since 1852. 15 salerooms are available to more than 70 auction houses. The emulation generated by an annual offer of 230,000 artworks from 21 major specialities - from Antiquity to street art - attracts some 3,000 visitors every day. The Group's digital platform, Drouot.com, offers digital sales - Live auctions (live broadcasting and participation in auctions), Online-only auctions (dematerialised auctions) and Buy Now sales (sales of lots at fixed prices). Nearly 2 million items are offered annually by 600 auction houses. Auction news is reported every week in La Gazette Drouot, the leading weekly magazine for the art market and culture published by Auctionspress.