Chronoswiss Open Gear ReSec Paraiba Limited Edition

Unveiled at the Watches and Wonders 2021, the Open Gear ReSec Paraiba watch by Chronoswiss incorporates a handmade guilloché watch display that agically changes from soft turquoise and petrol blue into jungle green and deep purple. The timepiece´s varying hues are as mesmerising as the semi-precious Paraiba tourmaline unique to the Brazilian region.

After months of testing a plethora of treatments, colouring agents, lacquers, finishes, patterns and materials, the most stunning result came from a secret, unique type of nano-decorative chemical vapour deposition. The relentless experimenting also led to the conclusion that the light reflection achieved with a short-wave guilloché pattern executed by hand in the Lucerne atelier was fundamental to achieving this mesmerising effect.

It mimics the different varieties of the Paraiba tourmaline. When exposed to light, the display of the timepiece changes from a soft, tropical lagoon turquoise to jungle-dark green, and from petrol blue to blue violet. Through this unique mix of traditional handmade guilloche and innovative use of CVD, Chronoswiss is able recreate the wonders of nature in a modern mechanical way.

The rest of the Open Gear ReSec Paraiba is packed with Chronoswiss characteristics, such as a regulator set-up with separated hours, minutes and seconds – in this case a 120-degree retrograde second in a conscious allusion to a 17th-century invention.

Add to that the typically knurled bezel and an abundance of fine finishes and grains, including a circular satin finish on the funnelled hour ring and a horizontally sanded plate revealing the number of the limited edition of 50 timepieces.

Technical details

Model: Open Gear ReSec Paraiba
Reference: CH-6923-TUBK, Stainless steel case, turquoise dial, hand-guilloched

Off-centre hours at 12:00, central minutes, retrograde seconds at 6:00

Solid 17-piece, stainless steel case, with satin finish
Polished bezel with partial knurling
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
Strap holders: screwed down with patented Autobloc system
Measurements: Ø 44 mm, height 13.35 mm

Chronoswiss caliber C. 301, automatic, with stop seconds
Diameter: Ø 36.50 mm
Impulse-angle: 51°
Jewels: 33
Balance: Glucydur, three-legged
Balance spring: Nivarox 1
Fine Adjustment: Via Excenter
Shock protection: Incabloc
Frequency: 4 Hz., 28‘800 A/h (semi-oscillations)
Power reserve: Approx. 42 hours

Special features
Skeletonized rotor with turquoise CVD coating, Côtes de Genève and ball bearing; polished pallet lever, escape wheel and screws; bridges and plates with perlage

Elaborate 42-part construction on two levels: bottom level hand-guillochéd with turquoise CVD coating, upper level galvanic black, featuring screwed-on skeletonized train wheel bridges and funnel-like construction for hour display, as well as a retrograde seconds display and cylinder and block shaped Super-LumiNova indexes

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

Hornback crocodile leather, hand-sewn

Limited edition of 50 pieces