Data sheet

Model: Tachoscope

Automatic wristwatch chronograph with regulator dial face and tachometer, with integral push-piece

Reference: CHA 1521 W and CHA 1520

Display: Hours, minutes, second, chrono-center seconds,
tachymeter scale

Housing: Solid 26-part housing, special Audi Design crown with integral push-piece (monopulsante) with replaceable seal system, exclusive design reserved for Chronoswiss, crown set in the solid housing material, diameter 42.80 mm, height: 11.80 mm; screwed, polished bezel with beveled edges and anti-reflective sapphire glass on one side, screwed strap holding bridges with the patented Autobloc system and special screws (Audi Design), water resistant up to 3 atm, incl. at the setting mechanism; mid-section with horns and brushed finish; upper housing section, push-piece, mid-section surface and beveled edge all polished to a high gloss. Movement: Manufacture caliber C. 125 (enlarged rotor with dia. 28.00 mm and ring with pearled finish around the movement), automatic winding mechanism, dia. 28,00 mm (11 ¾“), 30 jewels, Incabloc shock protection, 35-hour power reserve, 3 Hz., 21,600 A/h (oscillations), ratchet mechanism (installed on the dial face side) with kinetic operation, central chrono wheel mounted on ball bearings (for the first time in chronograph design), skeletonized rotor designed by Audi, individually numbered and engraved with the years 1909 - 2009 and the four Audi rings logo.

Dial: Dial with enameled face and printed Arabic numerals (special Audi font); timer, hours and minutes recessed, Tachymeter scale with 1/6 second increments (360 graduations), blued steel hands, shape: “Type C”.

Limited edition: Total series of 100 timepieces; 65 in white gold and 35 in platinum.

Delivery scope: The Tachoscope is delivered in a box with a black piano finish. Included are also a watchmaker’s loupe and a special screwdriver for changing the watchband.