Chronoswiss

Opus Chronograph

Reference Number :

CH-7543.1S-SI

Series : Sirius

Retail: $15,620

(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 TakeWhat a machine! The Opus Chronograph isn't just telling time; it's putting on a full mechanical ballet right there on your wrist. Forget a simple dial; this is a window into the soul of watchmaking. You see the gears turning, the escapement ticking away – it’s mesmerizing. The skeletonized C. 741 S movement isn't hidden; it's the star, framed by that solid silver dial that's been carved away to reveal the magic underneath. Those blued Breguet hands add a touch of classic elegance against the intricate backdrop. And it’s not just a pretty face; it's a proper chronograph ready for action, housed in a sturdy 41mm steel case with that cool knurled bezel and 100m water resistance. Strapped on with alligator leather, it feels both sophisticated and ready for anything. It’s a conversation starter, a testament to craftsmanship, and just plain awesome to look at.

DescriptionThis timepiece, reference CH-7543.1S-SI, features a case constructed from stainless steel, comprising 38 individual components. The case diameter measures 41 millimeters, with a height of 14.8 millimeters, ensuring a substantial presence on the wrist. Attachment points for the strap are configured with a width of 21 millimeters. The case surfaces exhibit a combination of finishes, incorporating both polished and satin-finished areas. Securing the case back is a screw-down design, which features a satin finish and incorporates a sapphire crystal window for viewing the movement. Protecting the dial side is a curved sapphire crystal, treated with a double anti-reflective coating to enhance legibility. The bezel employs a polished, screw-down construction characterized by a full thread and distinctive side knurling, contributing to the watch's robust aesthetic and functional integrity. Water resistance is rated at 10 bar, equivalent to a depth of 100 meters, suitable for surface water activities.

Powering the Opus Chronograph is the Caliber C. 741 S, an automatic movement distinguished by its skeletonized architecture. This intricate caliber operates at a frequency of 4 Hz, which translates to 28,800 alternations per hour (A/h), providing a smooth sweep for the seconds hand. The movement is equipped with 25 jewels to minimize friction at critical points, enhancing longevity and performance. When fully wound, it offers an approximate power reserve of 48 hours. Finishing details within the movement include polished surfaces on the pallet lever, escape wheel, and screws, while the bridges and plates are adorned with perlage. The rotor, responsible for automatic winding, is also skeletonized, rhodium-plated for durability and visual appeal, decorated with Côtes de Genève striping, and mounted on a ball bearing for efficiency. The dial itself is crafted from solid sterling silver (925) and features extensive skeletonization, revealing the underlying mechanics. Time and chronograph functions are displayed via central hours and minutes, a small seconds subdial, a central chronograph seconds hand, a 30-minute counter, a 12-hour counter, and an analog date display. The hands are thermally blued, diamond-cut, and curved, with the minute hand receiving a final bend by hand, adopting the "Breguet Losange" shape. Completing the watch is a Louisiana alligator leather strap secured with a folding clasp.

GenderMen

SignaturesChronoswiss

Country of OriginSwitzerland

Case Size41 mm

MovementAutomatic

CaliberC. 741 S

FunctionsChronograph, Hours, Minutes, Seconds, Date

Power Reserve48 Hours

Case MaterialsStainless Steel

Bezel MaterialsStainless Steel

Lug MaterialsStainless Steel

Case BackSapphire Crystal