Hermès and Jaeger-LeCoultre have created an Atmos clock with a hand-blown and carved enamel and crystal casing produced by Cristalleries the Saint-Louis, a subsidiary of Hermès.

First introduced in 1928 as a perpetuum mobile, the Atmos differentiates itself from every other mechanical timepiece in that it literally never needs to be wound.

It functions thanks to a mechanism that contracts and expands with the ambient temperature, so that a variation of 1 degree Centigrade is enough to keep it going for 48 hours.

Produced in a limited edition of 176, corresponding to the number of years since Hermès was founded, the Atmos Hermès clock will retail for 30,000 euros ($39,100).

Source: WWD