A Jaeger-LeCoultre Atmos clock, in presentation case and with brushed aluminium bracket (custom made for this clock). The brass framed case with four glass panels and chapter ring with brass Arabic numerals, encases the virtually perpetual motion movement, with the torsion pendulum driven by minute changes in either temperature or atmospheric pressure. 'Atmos, Swisse Made' on dial front and to verso 'LeCoultre & Cie, Swiss Made'. 22.5 x 18 x 13.5cm.