The Arnold & Son Royal Constant Force Tourbillon represents one of the most technically refined timepieces ever created by the British-Swiss manufacture.
Unveiled at Baselworld, this extraordinary watch combines a tourbillon, a constant-force mechanism and for the first time in Arnold & Son history, a true-beat (deadbeat) seconds display.

This rare horological masterpiece highlights the brand’s commitment to precision chronometry and mechanical innovation, pushing traditional watchmaking beyond conventional boundaries.

Skeletonized Architecture & Symmetrical Design

The fully openworked dial of the Arnold & Son Royal Constant Force Tourbillon allows a complete view of its sophisticated mechanical architecture.
Its design is based on perfect horizontal symmetry, with two oversized barrels positioned at the upper half of the movement.

At 4 o’clock, you can admire the one-minute flying tourbillon, while the innovative true-beat seconds mechanism sits at 8 o’clock.
This rare complication displays seconds in distinct jumps rather than smooth motion, improving legibility and precision.

Constant-Force Mechanism Explained

One of the most impressive technical highlights of the Arnold & Son Royal Constant Force Tourbillon is its patented constant-force system.
This mechanism regulates energy delivery from the barrels, ensuring that the escapement receives consistent power throughout the entire running time.

By maintaining stable torque, the system improves long-term accuracy, especially in a complex complication watch integrating both a tourbillon and a deadbeat seconds.

Caliber A&S5119 – High-End Hand-Wound Movement

Powering the Arnold & Son Royal Constant Force Tourbillon is the hand-wound Caliber A&S5119, developed entirely in-house.
The movement is composed of 39 jewels and operates at a frequency of 21,600 vibrations per hour.

Thanks to its twin-barrel system, the watch delivers an outstanding 90-hour power reserve, despite powering a tourbillon, constant-force mechanism and true-beat seconds display simultaneously.

The oversized crown enhances the manual winding experience, emphasizing the mechanical connection between the wearer and the timepiece.

46mm Rose Gold Case & Luxury Finishing

The Arnold & Son Royal Constant Force Tourbillon is housed in a bold 46mm 18K rose gold case, polished and brushed to perfection.
Both the front and caseback are protected by sapphire crystals, allowing an unobstructed view of the movement from either side.

The skeletonized bridges are meticulously hand-finished with haute horlogerie techniques, including beveling, satin brushing, and mirror polishing, reflecting the watch’s ultra-high-end positioning.

Limited Edition of 28 Pieces

The Arnold & Son Royal Constant Force Tourbillon is strictly limited to only 28 pieces worldwide, reinforcing its exclusivity among serious collectors.

With an official retail price of approximately €160,000, this model stands as one of the most significant modern achievements in constant-force tourbillon engineering.

For more high-end complications, you may also explore our feature on
Tourbillon Watches Guide
or learn more about the brand via
Arnold & Son Official Website.

Arnold & Son Royal Constant Force Tourbillon

18K rose gold case, 46mm diameter, sapphire front and caseback, fully skeletonized dial,
manual-winding Caliber A&S5119, 39 jewels, 21,600 vph, 90-hour power reserve,
alligator leather strap, rose gold pin buckle, water-resistant to 30 meters.

Complication: Tourbillon, constant-force mechanism, true-beat seconds.