The French inventor, Leon Hatot, named his company the way his name is pronounced: "Ah-toe."

The ATO clocks are based on the same electromagnetic principle as the Bulle clock except that the solenoid is stationary and the simple permanent magnet serves as part of the pendulum mass.

The clocks were offered in many stylish cases, many very small and in Lalique glass. Others were produced in metal utility cases to serve as master clocks controlling secondary or slave dials.

 

Height: 11.5 inches
Diameter: 7.5 inches
(at base)

 

After about 1932 and until 1950, the ATO name appears on similar battery clocks made by Hamburg-American Clock Co., Junghans and Keininger and Obergsfelt. Even Seth Thomas, Elgin and Bulova made ATO clock movements under license. Some can be found in Howard Miller cases. The clocks run very accurately using a single 1.5 volt dry cell.

 

Height: 18.5 inches
Width: 10.25 inches
Depth: 4.5 inches

 

 
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