Chronoswiss Open Gear Tourbillon Limited Edition

In the year 2000 Chronoswiss unveiled the world’s first serially produced regulator tourbillon. Now the Lucerne based brand presents the Open Gear Tourbillon, a modern mechanical timekeeper with a unique regulator set-up, electric blue case and a hypnotising handmade guilloche decoration. Its half-skeletonised flying tourbillon is completely designed in-house, and it is exclusive to Chronoswiss watches.

The tourbillon Chronoswiss manufactured more than 20 years ago – Régulateur à Tourbillon – also had a guilloché dial. Now Chronoswiss unveils the C.303 – its own half-skeletonised tourbillon movement, and the guilloché is added by hand in its atelier in Lucerne.

Chronoswiss Open Gear Tourbillon Limited Edition watch with blue CVD case

With the Open Gear Tourbillon the ‘blue hour’ gets a whole new meaning. Using 10 different shades of the colour historically symbolising loyalty, strength, wisdom and trust, the calm display of the watch is contrasted especially by the energetic, almost aggressively electric blue CVD coating on the 17-part, stainless steel case.

The Trigono-shaped hands are blue lacquered, with Super-LumiNova inlays and tips. For the hour and five-minute indexes, generous amounts of blue-hued lume are combined with zirconium oxide into solid bricks and pillars that shine through the night.

Chronoswiss Open Gear Tourbillon Limited Edition watch lume shot

The tourbillon may have roots stretching back to the end of the 18th century, but the Open Gear Tourbillon has everything you should expect from a modern mechanical timepiece.

Chronoswiss Open Gear Tourbillon Limited Edition watch electric blue case

The watch dial is an elaborate 42-part construction on two levels: the bottom level is hand-guilloched, whereas the upper level features skeletonised train wheel bridges and a funnel-like construction for the hour display. Other design details include all particular signifiers of a Chronoswiss watch: knurled bezel, onion crown and the hornback crocodile strap held in place with the patented Autobloc system.

Chronoswiss Open Gear Tourbillon Limited Edition watch case back view

There is also a hidden special engraving on the reverse side of the dial – for a unique melding of modern mechanical watchmaking and heritage, since the idea of a secret signature was in vogue around two centuries ago when the tourbillon was invented.

The Chronoswiss Open Gear Tourbillon is limited to 15 pieces.

Technical details

Model: Open Gear Tourbillon Reference
Reference: CH-3126-BLBL (Stainless steel case with blue CVD- coating, blue dial)

Solid 17-piece, stainless steel case, CVD-coated with satin finish and polished
Bezel with partial knurling and curved
Double coated anti-reflective sapphire crystal
Screw-down case back with satin finish and sapphire crystal
Onion crown
Water resistance up to 10 bar
Screwed strap bars with patented Autobloc system
Measurements: Ø 44 mm, height 13.1 mm

Chronoswiss manufacture caliber C.303, flying tourbillon, semi-skeletonized, hand-wound
Diameter: Ø 32.8 mm
Jewels: 23
Shock protection: Incabloc
Frequency: 4 Hz., 28‘800 A/h
Power reserve: Approx. 60 hours

Special features
Exclusive movement with blue CVD coating, main plate with Côtes de Genève, skeletonized bridges with circular satin finish, balance wheel galvanic anthracite, skeletonized spring barrel, polished screws

Off-center hours at 12:00, central minutes, flying tourbillon at 6:00

Elaborate 42-part construction on several levels: bottom level with Côtes de Genève, middle level hand-guilloched and hand-engraved (“Atelier Lucerne” on reverse of dial), upper level featuring screwed-on skeletonized train wheel bridges and funnel-like construction for hour display; bar or cylinder shaped Super-LumiNova indexes

Lacquered blue, with Super-LumiNova inlays and tips, “Trigono” shape
Feuille shape; curved, rhodium-plated and diamond cut

Hornback crocodile leather, hand-sewn

Limited to 15 pieces