Timepiece

A timepiece comprising:

• time measuring means including an oscillator as a time base and a timekeeping means synchronized with said oscillator for keeping time information,
• driving means, partially mechanical time display means rotated by said driving means for displaying at least part of the time information kept by said time keeping means when said time keeping means is in a time keeping mode, said time display means including an input data display part including at least an hour display, a minute display and a calendar display, said input data display part having a display which is changeable by a display changing means to display a data to be delivered to the time measuring means when the time measuring means is in an input mode and to display the time information when the time measuring means is in the time keeping mode,
• information means included in said time measuring means for providing additional time-related information,
• inserting means for inserting the data into the information means, said inserting means including an actuating member for selectively actuating the time keeping mode and the input mode, a discriminating means for determining whether the timepiece is in the time keeping mode or input mode in accordance with the actuating member, and control means for controlling the transmission of the data to the information means, said controlling means transmitting during the input mode the data corresponding to the display of the input data display part, and
• said timekeeping means keeping the time information independentaly of the display of the input data display part when said time measuring means is in the input mode and including a compensating means for providing the display of the input data display part with information corresponding to the time information of the time keeping means when the mode of said time measuring means is changed from the data input mode to the time keeping mode.