Chronoswiss

Lunar Chronograph

Reference Number :

CH-7543L-BL

Series : Sirius

Retail: $11,880

(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 TakeForget mere time-telling; this Chronoswiss Lunar Chronograph is a slice of the night sky strapped to your wrist, wrapped in engineering precision. The galvanic blue dial, intricately carved with guilloché patterns, pulls you in like a deep nebula, while the genuine moon phase complication adds a poetic touch – a constant reminder of celestial cycles. It’s not just about looks, though. The chronograph functions stand ready, controlled by satisfyingly solid pushers, measuring elapsed moments with mechanical reliability. Those elegant, white Breguet hands sweep across the textured blue expanse, pointing not just to the hour, but to a tradition of fine watchmaking. Even the details, like the hand-bent minute hand and the knurled bezel, speak to a level of craft often lost today. Securing it is a plush alligator strap, completing a package that feels both substantial and sophisticated. It’s a conversation starter, a precision instrument, and a little bit magical, all powered by the intricate dance of the C. 755 automatic movement visible through the back.

DescriptionManufacturing specifications dictate a case constructed from stainless steel, comprising 38 individual components. The enclosure features a diameter measurement of 41 millimeters and a vertical height profile of 14.8 millimeters. Securing the mechanism involves a screw-down case back, notable for its satin finish and integrated sapphire crystal exhibition window. The case exhibits a dual finish, incorporating both polished surfaces and areas with a satin texture. Affixed to the case is a polished, screw-down bezel distinguished by its side knurling and full threading configuration. Protecting the dial is a curved sapphire crystal treated with an anti-reflective coating. Integration with the strap is facilitated by lugs spaced 21 millimeters apart. The assembly provides water resistance rated to 3 bar, equivalent to a depth of 30 meters.

Powering the instrument is the Caliber C. 755, an automatic winding mechanical movement. This caliber operates at a frequency of 4 Hertz, corresponding to 28,800 alternations per hour, and maintains a power reserve of approximately 46 hours when fully wound. Its architecture incorporates 25 jewels to minimize friction. Finishing details within the movement include a polished pallet lever, escape wheel, and screws, while the bridges and plates are adorned with perlage. The oscillating weight, or rotor, is skeletonized for visual access, plated with rhodium, decorated with Côtes de Genève finishing, and mounted on a ball bearing system for efficiency. The dial itself is fabricated with a galvanic blue base and features intricate guilloché decoration. Time and chronograph functions are displayed via central hour and minute hands, a small seconds sub-dial, a central chronograph seconds hand, a 30-minute counter, and a 12-hour counter. Additional complications include an analog date display and an indicator for the moon phase. The hands are crafted in the "Breguet Losange" style, finished with white lacquer; the minute hand undergoes manual bending. Attachment to the wrist is achieved via a hand-sewn Louisiana alligator leather strap, offered with either a traditional pin buckle or a deployant folding clasp.

GenderMen

SignaturesChronoswiss

Country of OriginSwitzerland

Case Size41 mm

MovementAutomatic

CaliberC. 755

FunctionsChronograph, Hours, Minutes, Seconds, Date, Retrograde

Power Reserve46 Hours

Case MaterialsStainless Steel

Bezel MaterialsStainless Steel

Lug MaterialsStainless Steel

Case BackSapphire Crystal