HEUER Calculator. Ref : 110.633. Circa : 1970. Important steel bracelet chronograph and calculator ruler. Barrel case with crown on the left and smooth pushers. Screwed back. Bezel with double graduation scales for the conversion of weights, volumes and distances. Blue dial with luminescent index and hands. Two counters for the 30 minutes and 12 hours of the chrono. Date window at 6 o'clock. Mechanical winding movement, caliber 12. Steel bracelet ZRC. Sold with instructions for use. Diameter: 46 mm. Important steel bracelet chronograph with slide rule, Mechanical winding movement, calibre 12, by heuer.

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.