Assertion: steel tuning fork | /r/HasProperty | powered by battery
Facets:
value: as its timekeeping element
type: CAUSE
Source sentences:
text: The Accutron, an electromechanical watch developed by Max Hetzel and manufactured by Bulova beginning in 1960, used a 360-hertz steel tuning fork powered by a battery as its timekeeping element.
text: The Accutron, an electromechanical watch developed by Max Hetzel and manufactured by Bulova beginning in 1960, used a 360-hertz steel tuning fork powered by a battery as its timekeeping element.