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Publication date
Publication of BE409010ApublicationCriticalpatent/BE409010A/xx
G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
G04D7/00—Measuring, counting, calibrating, testing or regulating apparatus
G04D7/12—Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard
G04D7/1207—Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard only for measuring
G04D7/1214—Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard only for measuring for complete clockworks