The 'Time of Trip', the first dashboard chronograph patented by TAG Heuer in 1911, was designed for aircraft and automobiles. Its 11-cm diameter and its size are well suited for installation on all types of dashboards. The large hands at the centre of the dial indicate the time. The small pair of hands, at the 12 o'clock position, give the duration of the trip (not exceeding 12 hours). The same button is used to start, stop and reset the clock. A small window at the 3 o'clock position serves to monitor the proper operation of the device.