Men's watch Omega Constellation Electronic Chronometer F 300 Hz, Switzerland, circa 1970, rectangular stainless steel case, blue dial with centre seconds and date, in working order, on original steel bracelet with folding clasp, Z 2, 35 x 40 mm. Info: 20 Swiss watch companies worked together in 1969 to develop the Beta 21 movement. This new type of movement was called "electronic", it was the Swiss watchmakers' answer to the first commercial Japanese quartz watch, the Seiko quartz Astron.

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.