The Arnold & Son Constant Force Tourbillon Is a Technical Tour de Force

  • Constant Force Tourbillon
  • Constant Force Tourbillon

Striving for the utmost in timekeeping precision, Arnold & Son’s new Constant Force Tourbillon is designed to eliminate inaccuracies introduced by variances in the power that is supplied to the regulator as the mainspring winds down. To accomplish this, the watch is equipped with two barrels; one supplies power to the gear train, while the other supplements the power of the main barrel if its torque output drops below optimal levels. Rather than sacrifice precision, the watch will stop operation if power from the mainspring drops to a level that would compromise precision.

In a visually pleasing counterbalance to the double mainsprings, the lower half of the dial is occupied by the tourbillon, alongside a rotating second hairspring that feeds consistent power to the regulator. This hairspring also powers the watch’s true-beat seconds function—a signature feature of Arnold & Son watches—wherein the seconds hand visibly ticks off the passage of each second instead of constantly and smoothly rotating.

The Constant Force Tourbillon will be limited to 28 examples; it is priced at $197,500. (arnoldandson.com)

From Around the Web...
The $38,000 watch features a manually-wound movement displayed amidst titanium and ceramic…
Showcasing tuneful automata, the limited-edition release will comprise 16 examples…
More complex than its spare style suggests, the Richard Lange Jumping Seconds is a visionary design…
Paul Boutros of Phillips Watches reveals the current watch that’s sure to be a collector’s item…
The smart-watch collection features new styles and strap colors to satisfy the techie fashionista…
Photo by Claude-Alain Fluckiger
Catch the intricately engraved bouquet on the Petite Heure Minute…
Join the First Look webcast for an inside look at 12 rare Patek Philippe minute repeater timepieces...
The timepiece’s sidereal-time display tracks the movement of the stars with zodiac indications…
Here's a look at five of the dozen minute repeaters demonstrated on August 30…
Within the 18-karat-gold case is a dial depicting the schooner America sailing to victory in 1851…