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Publication of FR772885ApublicationCriticalpatent/FR772885A/fr
G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
G04C3/04—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance
G04C3/06—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance using electromagnetic coupling between electric power source and balance
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FR772885D1933-05-041934-05-04Dispositif de contact pour pièces d'horlogerie électriques
ExpiredFR772885A
(fr)