Switzerland, c. 1952-72. Mechanical movement with pendulum, it derives energy from small temperature changes and atmospheric pressure changes in the environment. Brass, gilded, five sides with glass. White dial ring, sign. "Le Coultre Swiss" with gilded roman numerals, golden hands, in front marked "Switzerland unadjusted Fifteen 15 Jewels VXN Le Coultre & Cie Atmos", on top marked "Le Coultre Atmos 18 32 32". Functioning, new price over 5.800,- Euro. H. 23,5 cm, 21 x 16 cm.