Jaeger-Lecoultre - A Gold Plated Atmos Perpetual Clock, Swiss, 1970’s,
the model 528-8, with a four glass case and skeleton movement, with gold plated base and pillars with a drop down front glass door to access the dial to set the time, with a champagne dial with black numerals and is model number 504530, clock has two adjustable feet to the front and a central spirit bubble for setting it perfectly level upon installation.
Dimensions: height: 9 3/4" (23.5 cm.), width: 8 1/4" (21 cm), depth: 6 1/2" (16 cm.)

Gold-tone plating worn in some places

Atmos Clock are also called torsion clocks or anniversary clocks although Atmos is the given name by Jaeger-LeCoultre. They are clocks which work under the perpetual motion theory meaning they hypothetically run forever. They work from a contraction and expansion of bellows in the rear casing which automatically winds the spring in the main movement allowing it to run continuously without any winding or given power.

I recommend flexibity with the selling price as they can be found for as little as $600