Perpetual Calendar Openworked

The Sovereign Debut of Calibre 7139 & Mechanical Perpetual Calendar Depth

The mechanical epicenter of this landmark creation introduces a profound engineering achievement with the manufacture’s high-performance in-house openworked movement, Calibre 7139. Comprising 420 individual parts and incorporating 41 jewels, this self-winding mechanism operates at a high frequency of 4 Hz (28,800 vph) and delivers a robust 55-hour power reserve, all while maintaining an incredibly slim movement profile of just 4.1 mm. The caliber drives a complete, high-complication Perpetual Calendar system featuring a unique central week indication track, day, date, month, leap year cycle indicator, and an advanced astronomical moon phase system that remains accurate without manual correction until the year 2100.

Transparent Sapphire Dial Artistry & Technical Geometric Legibility

The visual composition of the face relies on an elegant transparent sapphire dial that serves as a multi-dimensional foundation for the skeletonized mechanism. To secure absolute legibility without compromising the structural view, the configuration utilizes transparent grey subdials bordered by a smoked external zone to sharply segregate the calendar telemetry. The central hands are sculpted from 18-carat white gold and filled with premium luminescent material for nighttime read capability, paired with rhodium-toned hour-markers crafted in 18-carat pink gold. The entire layered presentation is cleanly framed by a dark black inner bezel, offering an exceptional contemporary polychromatic contrast.

Advanced Structural Synergy: White Gold and High-Tech Ceramic

The physical case architecture measures a perfectly balanced 41 mm in diameter and an ultra-thin thickness of just 10.6 mm, providing exceptional ergonomic comfort on the wrist. Its multi-piece profile utilizes a high-contrast material combo, pairing an octagonal middle case and custom crown sculpted from durable, highly scratch-resistant black ceramic with a round thin bezel, stylized open lugs, and an exhibition sapphire caseback forged from polished and satin-brushed 18-carat white gold. To finish the lifestyle presentation, the timepiece comes fitted with a classic black alligator leather strap and a refined 18-carat white gold three-blade folding clasp, ensuring a secure fit and water resistance to 30 m.

TECHNICAL SPECIFICATIONS

1. Movement: In-house ultra-thin self-winding mechanical openworked perpetual calendar caliber (Calibre 7139).
2. Special Enhancements: Premiere implementation of Calibre 7139 openworked perpetual calendar movement in Code 11.59 history.
3. Number of Parts: 420 components | Jewels: 41 jewels.
4. Frequency: 4 Hz (28,800 vph).
5. Power Reserve: 55 hours.
6. Movement Dimensions: Total diameter 29.6 mm | Thickness 4.1 mm.
7. Functions: Perpetual calendar with week indication, day, date, month, leap year cycle, astronomical moon phase, hours, and minutes.
8. Case: High-tech black ceramic middle case and crown with premium 18-carat white gold lugs, bezel, and caseback; 41 mm diameter, 10.6 mm thickness.
9. Dial Face: Transparent sapphire dial layout, transparent grey smoked subdials, luminescent white gold hands, rhodium-toned pink gold markers.
10. Glass & Caseback: Anti-reflective glareproofed sapphire crystal and exhibition back.
11. Strap: Premium hand-stitched black alligator leather strap.
12. Buckle Type: 18-carat white gold three-blade folding clasp.
13. Water Resistance: 30 m.
14. Status: Active / Available for Order (Brand New).