Offered from our private collection, this iconic Jaeger-LeCoultre Atmos clock – reference 528 – is a Swiss-made mechanical wonder powered by changes in air temperature and pressure. Its famous bellows mechanism silently winds the mainspring without human intervention. Just a one-degree change in ambient temperature can keep it running for days. – Caliber 528-8 – Estimated production year: 1972 – Brushed golden brass frame with glass panels – Dial signed “LeCoultre”, original gilded hands and indices – Serial and manufacture details visible on top plate – Case shows age-consistent patina and wear on corners (see photos) – Movement appears complete and in good visual condition – The torsion pendulum and movement lock work as intended This is not just a clock – it’s an object of precision, a sculpture of time, and a talking point in any interior. No power source, no winding key – just pure horological magic. NOTE: Due to the delicate nature of Atmos clocks, the pendulum will be secured for shipping. Shipment will be insured. All items listed in our auctions come from our private collection. We are TOP-rated sellers with the best reviews. We ensure fast shipping with a tracking number for secure transactions.