A VERY RARE 1930'S CHROME 'PENDULE PERPETUELLE' ATMOS CLOCK BY J.L. REUTTER, NO. 3317 the case with bevelled glass panels and front and back door, on a shaped plinth base with pendulum lock switch, the plinth engraved '1921-1934 A NOTRE CHER PRESIDENT EN TEMOIGNAGE DE RECONNAISSANCE ET D'AMITIE', the back with applied plaquette signed 'BREVETS J.L. REUTTER SGDG MADE IN FRANCE', and numbered 3317, the dial with applied Arabic numerals, the centre signed 'ATMOS PENDULE PERPETUELLE / BREVETE J L REUTTER', the movement powered by changes in the air pressure, with chromed torsion pendulum, 23cm high Please Note: This lot will be on display at our South Kensington branch from 29th May until it goes on view at Chiswick from 7th June. Provenance: From a private collection. Condition: Seen running in owner's home and recently serviced, in fine original condition but not fully tested or guaranteed. Notes: J.L. Reutter invented the Atmos clock, known as Atmos 1, powered by changes in the air pressure, and later sold the patent to Jaeger Lecoultre who produced variations on the theme from the 1940's and throughout the 20th century.