Dating an atmos clock
Kennedy, Sir Winston Churchill, General Charles De Gaulle, and Charlie Chaplin.
This model later named the Atmos 2, was announced on 15 January 1936, but problems delayed full production until mid-1939. To date, over 500,000 Atmos clocks have been produced.
So it's not surprising that 60 million Atmos clocks together consume no more energy that one 15-watt light bulb.
All its other parts, too, are not only of the highest precision, but also practically wear-free.
The torsion pendulum has a period of precisely one minute; thirty seconds to rotate in one direction and thirty seconds to return to the starting position.
This is thirty times slower than the 0.994 m (39.1 in) seconds pendulum typically found in a longcase clock, where each swing (or half-period) takes one second.The King James clock was known as the Eltham Perpetuum, and was famous throughout Europe. Clocks powered by atmospheric pressure and temperature changes were subsequently developed by Pierre de Rivaz in 1740, and by James Cox and John Joseph Merlin (Cox's timepiece) in the 1760s.