Timepiece comprising means for attaining the function of measuring the time, a time display means, at least part of which is mechanically formed, a means for changing the displayed content of the time display means in response to the operation of an external actuating member and a means for setting information for setting the condition of a timepiece function in accordance with the operation of the external actuating member, the time display means serving as the display of the information to be set upon the setting of the information whereby there may be easily effected the setting of functions except the time setting without increase of the complication of the display means.