IMHOF Model: Ariane Atomic Observator Time ref. 150/1120 perpetual calendar Years: 1967/68 Case: beechwood and gilt brass Dial: beechwood, center seconds and display with digital seconds or date on request Movement: radio-controlled quartz with very high precision and automatic change from daylight saving time to daylight saving time and vice versa Accessories: illustrative brochure of the time Dimensions: 18.8 x 14.8 cm the Imhof Obstervatory Time picks up Hertzian frequencies from an observatory that emits coordinated universal time, the absolute second. The engineers and creators of the Imohf manufacture have brought to life a radio-receiver clock, combining absolute precision with the beauty of an objet d'art.

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.