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.
Movement: HAN3601 modified automatic chronograph movement (bicompax), based on the Valjoux 7753 calibre, asymmetrical button arrangement; 28,800 vibrations per hour, 4 Hz; 27 jewels; power reserve of min. 42 hours
Functions: Small seconds at 9 o’clock, 30-minutes counter at 3 o‘clock, tachymeter scale in the centre, telemeter scale on the peripheral edge
Case: Stainless steel; red reset button; fluted, bidirectional rotating bezel with red marking; convex, internally anti-reflective sapphire glass; screwed-down case back; diameter 40 mm, height 13.7 mm; water-resistant to 10 bar/100 m
Dial: Off-white; Super-LumiNova®-coated, luminous numerals and hands