Chronoswiss Opus – The First Serially Produced Automatic Skeleton Chronograph

The automatic Chronograph is an exceptionally complex masterpiece of precision watchmaking consisting of over 300 parts. However, the finished product is more than the sum of its parts. Constructed by master craftsmen the chronograph enables timing from mere fractions of a second through to twelve hours thanks to an ingenious linkage system of heart-shaped disks, various cogs, levers and springs. The really remarkable feature of the chronograph is however, that the hours, minutes and seconds an still be read from the watch face, even while timing mode. Another hand displays the date. A rotor uses the natural movement of your arm to wind the main spring. The chronograph movement is protected by a sturdy case offering unsurmounted functionality.
Lovers of mechanical watches are often fascinated by the complicated interior workings an varied operational processes of such movements, but as a rule, only the watchmaker has the oppotunity to admire the inner workings in detail. A crystal back only partially satisfies the desire to view the switching and winding process that takes place behind the watch face. That is why Chronoswiss with its skeleton version exposes the technology inside the automatic chronograph. In a painstaking process the dial has been eliminated, thus created a fine skeleton version of this chronograph.
It is difficult to describe the fascination of the skeleton construction as a microscope is necessary to discover all the inner workings. Only then is it possible to probe the heart of the 7,9 mm mechanism. One can see how the counter continues to move after every rotation of the chronograph hand and how the hands reset back to zero at the end of the timing procedure. One can see how the date begins to change just before midnight.

Technical details

References
CH 7520, platinum 950 (62g), limited edition (99 pieces)
CH 7521 S, 18ct. gold (52g)
CH 7521 S R, 18ct. red gold (52g)
CH 7521 S W, 18ct. white gold (52g)
CH 7522 S, gold (12g)/steel
CH 7522 S R, 18ct. red gold (12g)/steel
CH 7523 S, steel
CH 7523 S bl, steel

Displays
Hour, minute, second, analog date, Chrono-center-second, 30-minute-register, 12-hour-register

Case
Massive 23-part case, ø 38 mm, height 15 mm, smoothed and polished, screwed, decorative bezel with non-reflective sapphire crystal, screwed back with full thread and non-reflective sapphire crystal, massive turnip crown and pushers, screwed-on strap bars with patented Autobloc safety system, water-resistant up to 3 atm (30 m)

Movement
Chronoswiss Caliber C.741 S, skeletonized, automatic winding,ø 30 mm (13¼ ´´´), 25 Jewels, Incabloc shock-absorber,46 hours power-reserve, 4 Hz., 28.800 vibrations per hour (vph)

Dial
Skeletonized and angled metal-dial with, printed Arabic numerals,minute-display with ¼ second-circle, polished or blued steel hands Breguet Losagne

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