[Stereoscopes]. Stereo-graphoscope, wooden viewer for the viewing of (stereo)photographs, late 19th cent., a double-layered box of wood, the hinging lid consisting of a front incorporating double lenses w. eye-pieces and a single magnifying glass above w. 2 compartments: in the upper compartment a hinging and sliding holder w. brass poles; the lower compartment possibly for the storage of stereophotographs, total size 21,5(l.)x14(w.)x6,5(h.) cm. (when closed). = In fine condition. A very nice instrument for use on table surface, allowing the viewer to be used both horizontally as well as in a sloping position (by propping up the hinging middle part of the stereoscope with a wooden leg).

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.