Atmos II self-winding clock by Jaeger-LeCoultre, 1930s

Atmos II self-winding clock by Jaeger-LeCoultre, 1930s

This clock has a bellows filled with ethyl chloride gas which expands and contracts with changes of temperature and atmospheric pressure. These movements wind a large spring by a ratchet mechanism, so the clock never needs to be wound.

Source: De Trevars Ltd

 
Currently on display in:
Measuring Time
Year made :
c. 1939
Inventory number :
1939-259