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GB915074A
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Improvements in devices for enabling a numerical reading to be obtained from the trace produced by a watch-timing machine or similar instrument
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US3184623A
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Miniature electric motor
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US3121811A
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Speed governor for miniature electric motor
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US2981054A
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Time-piece
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GB908961A
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Improvements in or relating to electric clocks
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US3026708A
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Microphone for apparatus to check the rate of timepieces
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US3026707A
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Microphone for apparatus to check the rate of timepiece movements
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GB864480A
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Casing for a clock, more particularly an electric clock
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US3008288A
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Timepiece mechanism and cabinet
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GB851481A
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A constant force escapement for electric time pieces
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US2958180A
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Constant force escapement for electric time-pieces
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GB772950A
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Device for adjusting the effective length of the regulating hairspring of a timepiece
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