AIRBORNE PRECURSORS - UNITED STATES. FIRST POSTAL AIR ROUTE FLIGHT CINCINNATI - OHIO to CHICAGO; Letter departing CINCINNATI on December 17, 1927 for Paris / France. Postage 13 cents :10c blue SPIRIT of St LOUIS airplane, commemorating Charles LINDBERG's Atlantic crossing (Av 10) + 1c B. Franklin n° 228 + 2c 150 ans du Vermont n° 271. Claw holder, struck in violet, rectangular cutaway, flight commemorative text and illustration of 2 wings. - On back: Chicago & New York transit cancels + large round propaganda cancel for the new air service: "Cincinnati the quenn city, now your neighbor, 1st US AIR MAIL flight...".

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.