Around 1920 (1922 according to Rita Shenton in "Collectable clocks"or 1919 from other sources), The Synchronome Company introduced a new model, now often called the "Double A Frame" or AA frame clock which had been patented during the 1914-18 war. It was found that it did not provide any great improvement in accuracy and needed expert technical skill to set up and maintain so it only remained in production for one year and only about 150 clocks were produced.
It is nevertheless a very desirable collectors item and I am honoured to have received a set of photographs for the museum.
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