Pioneer • TachyTeleModel 712.200-6428 By Hanhart
The Pioneer TachyTele features in addition to the stop function two practical scales which are easily readable against the dial, thanks to their red finish: the tachymeter scale for measuring average speeds is incorporated in the centre of the dial in a spiral formation. As this scale allows for a total of three revolutions of the stop indicator hand, it considerably extends the measurement range, enabling even relatively slow speeds of 60 km/h down to 20 km/h to be measured. The telemeter scale, which is printed on the peripheral edge of the dial, is used for measuring distances, taking into account the speed of sound.
HAN3703 modified automatic chronograph movement (bicompax), based on the Valjoux 7753 calibre, asymmetrical button arrangement;
28,800 vibrations per hour, 4 Hz;
Power reserve of min. 42 hours
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