Chronoswiss Pathos (1998) – The World’s First Skeletonized Split-Second Automatic Chronograph

Hard-core fans of mechanical chronographs are special people. Next to their passion for all things chronometric they can also be recognized by their burning fascination for the interior workings of their timepieces and the various functions. This is especially true for complications. Many of the switching and winding processes take place hidden by the dial or numerous bridges and cocks.

As early as 1995 Chronoswiss already put an end to this state of affairs for good. With painstaking attention to detail the proven 8.3 mm high Caliber was given a gratifying degree of transparency. On the “Opus” Technicus, Watch of the Year in 1996, all the extraneous material which could possibly be cut away to allow a better view was done away with. What remained was a perfectly functioning skeleton which reveals even the best kept secrets of the automatic chronograph.

Since 1992 a superlative form of the automatic chronograph also exists. That is the automatic chronograph with split-second. This complex mechanism substantially increases the watch’s possible applications: several events of varying duration, such as races and games, can be timed simultaneously if they begin at the same time. To make this possible the split-second is linked to the chronograph hand via a complex escapement..

As an expert mechanics specialist Chronoswiss had begun work on this interesting additional function at the beginning of the 90s, and by 1992 it launched the world’s first chronograph-Rattrapante with automatic winding mechanism and a classical split-second hand controlled by the pillar wheel and clam set. Due to the patented construction with the off-center hour and minute hands at the “3” the height of the movement remains the same.

Nevertheless, the complex engineering on the Chronoswiss-caliber C.732 is to be found directly beneath the dial – much to the regret of all technology followers, who wish to be able to observe the functional interplay between the pillar wheel, clam set and corresponding split-second runner with their own eyes.

At 1998 Basel watch fair, Chronoswiss had once again pulled back the veil of secrecy. What was exposed is an exclusive new innovation and world first. The automatic Chronograph-Rattrapante is presented in its skeleton form. A concentrated look through the watchmaker’s magnifying glass – which Chronoswiss gladly sent to all owners of this watch – brings all the moving processes into the light of day. For example, the fine pillar wheel in the cutout of the permanent second at the “9”, which rotates upon activating the pusher at the “10”, opening or closing the split-second clam set.

Technical details
References
CH 7320 S, platinum 950 (69g) limited edition (99 pieces)
CH 7321 S, 18ct. gold (56g)
CH 7322 S, 18ct. gold (14g)/steel
CH 7323 S, steel

Displays
Hour, minute, second
Chrono-center-second with fly-back hand
30-minute-register, 12-hour-register

Case
Massive 25-part case, ø 38 mm, height 15,25 mm, smoothed and polished, screwed, decorative bezel with non-reflective sapphire crystal, screwed back with full thread and non-reflective sapphire crystal, turnip crown and pushers, fly-back hand pushers red gilt, screwed-on strap bars with patented Autobloc safety system,water-resistant up to 3 atm (30 m)

Movement
Skeleton chronograph with automatic winding mechanism and patented split-second function, pillar wheel with clam set, patent number 682201-OG, Chronoswiss Caliber C.732 S,ø 30 mm (13¼ ´´´), 28 Jewels, Incabloc shock-absorber,46 hours power-reserve, 4 Hz., 28.800 vibrations per hour (vph)

Dial
Skeletonized, white-varnished metal dial with printed Roman numerals, minute-circle with ¼ second-division, individually numbered,blued steel hands, red gilt fly-back hand.

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