Chronoswiss

Grand Regulator Skeleton

Reference Number :

CH-6721RS-BLSIB

Series : Flying

Retail: $26,290

(As of: 04/2025)

This watch is not for sale, this page is just for reference purposes only. If you would like to purchase this watch, please contact Chronoswiss. If you are interested in selling this watch to us, you can contact us here.

Quick TakeTalk about making an entrance! The Flying Grand Regulator Skeleton isn't just a watch; it's a piece of mechanical theatre for the wrist. That 18-karat red gold case gleams with purpose, a warm frame for the intricate dance happening within. Chronoswiss went all-in on transparency here, stripping away almost everything non-essential to reveal the C.677S movement in all its skeletonized glory. You see the blued screws pop against the circular-grained bridges, the gears turning – it's pure mechanical eye candy. The multi-level dial adds incredible depth, making the regulator layout—hours up top, seconds below, minutes reigning supreme from the center—feel like a tiny, complex city. It’s like they built a viewing gallery specifically for the movement. And being one of only ten? That's not just exclusivity; it's belonging to a tiny club of people who appreciate this level of bold, open-worked artistry wrapped in precious metal. The hand-sewn Hornback croc strap just seals the deal – luxurious, detailed, and ready for admiration.

DescriptionFabricated from 18-karat red gold, the case of the CH-6721RS-BLSIB model measures 44 millimeters in diameter and possesses a height of 12.48 millimeters. This substantial structure, composed of 21 individual parts, accommodates a standard band width of 22 millimeters. The case finishing involves a combination of polished surfaces and areas treated with a vertical satin finish, contributing to its visual complexity. An onion-style crown facilitates winding and time-setting operations. Protection for the dial is afforded by a curved, non-reflecting sapphire crystal, which is secured by a polished screw-down bezel featuring a full thread and distinctive side knurling. Ensuring structural integrity and providing a view of the internal mechanism, the case back is a screw-down type executed with a satin finish and incorporates an integrated sapphire crystal display window. The design achieves a water resistance rating of 3 bar, equivalent to a depth of approximately 30 meters, suitable for incidental exposure to moisture but not intended for submersion or water-based activities.

Powering this timepiece is the manually wound Caliber C.677S movement. This intricate mechanism operates at a frequency of 2.5 Hz, which translates to 18,000 alternations per hour (A/H), providing a power reserve of approximately 46 hours when fully wound. The movement architecture incorporates 17 jewels to minimize friction at critical points. Significant finishing techniques are applied throughout the caliber: the pallet, pallet-wheel, and visible screws undergo polishing. Extensive skeletonization is evident on the plate and bridges, which are further embellished with circular graining. The gear wheels are also skeletonized, reducing material mass and enhancing the visual penetration into the mechanism's depths. Select screws receive thermal bluing treatment, introducing a distinct color contrast. Time indication follows a classic regulator format, displaying off-center hours via a subdial positioned at 12 o'clock, central minutes using a large, dedicated hand, and small seconds presented in a subdial located at 6 o'clock. The dial itself is a complex, multi-level construction; it features a skeletonized base incorporating a funnel design element. Situated on the middle level is the hand-painted individual limitation number, signifying its place within the exclusive series. The uppermost level is galvanic silver, secured onto foundation blocks with screws. The hands are crafted in the "Poire Stuart" shape, featuring red gold plating or lacquer, and possess a distinct curve; notably, the minute hand is meticulously bent by hand during assembly. This model is strictly limited to 10 pieces worldwide.

GenderMen

SignaturesChronoswiss

Country of OriginSwitzerland

Case Size44 mm

MovementHandwound

CaliberC.677S

FunctionsHours, Minutes, Seconds, Regulator

Power Reserve46 Hours

Case MaterialsRed Gold

Bezel MaterialsRed Gold

Lug MaterialsRed Gold

Case BackSapphire Crystal