DIDEROT (Denis) & D'ALEMBERT. Collection of plates for the new edition of the Dictionnaire raisonné des sciences, des arts et des métiers. Lausanne and Bern, the typographical societies, 1779. 3 volumes small in-4, marbled basane, spine ribbed and decorated, lemon morocco title and goblet (period binding). Swiss counterfeit of the encyclopaedia of Diderot and d'Alembert. The three atlases are composed of 444 engraved plates of mathematics, astronomy, geography (including 10 folding maps), physics, marine, military arts, architecture, medicine, music... Covers and corners worn, wetness in volume 3.

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.