R. BONNER THOMAS 4 BANK PLACE PORTMADOC rare, double face astronomical pocket watch, Switzerland around 1900, partial gold-plated, aftermarket blued metal case, front enamel dial with hours, minutes, seconds and moon phase, backside manual calendar with day, date and month, month adjust, hand-setting knob at 11, patented Swiss mechanic, gold- plated bar construction lever movement, compensation-balance, Breguet-hairspring, diameter approx. 52 mm, overhaul recommended at buyer's expense, condition 2-3, property of a collector

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.