Glass in brass framework.Movement:
Atmos by Jaeger-LeCoultre SANotes:
Very collectable.I did not think my museum would be complete without a sample Atmos but unfortunately have never owned one. Mike Murray came to my rescue with this image.
I cannot do better than to suggest that you visit Mike's Clock Clinic and view his file "Basic information on the Atmos" for a full description and notes on the priciple of operation