Mr. Eleuteri said he was 28 when he began buying decorative desk clocks — mainly by Cartier, but also Jaeger-LeCoultre — from antique shops or his jewelry clients.

The Atmos, which launched in 1928 and is designed to tick forever, is the subject of an exhibition called "Living on Air," which runs until Sunday at Villa Mozart in Milan.

The second Jaeger-LeCoultre clock announced at the show, the Atmos Infinite (€14,000), is more minimalistic in style and functionality, and comes housed in a chic and understated circular glass ...

The Atmos, which launched in 1928 and is designed to tick forever, is the subject of an exhibition called "Living on Air," which runs until Sunday at Villa Mozart in Milan.