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Results for Tourbillon

2,308 articles · 4 videos found · page 22 of 78

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Flying Tourbillon

Alfred Helwig's 1920 tourbillon variant with no upper bridge; the entire cage is visible.

Exclusive · Guide
H. Moser & Cie. Streamliner Tourbillon Skeleton Ceramic Alpine Limited Edition: A Ceramic Case Changes Everything

Moser's wildest Streamliner yet pairs a flying tourbillon skeleton with a ceramic case, all under the Alpine F1 banner

Exclusive · Guide
Girard-Perregaux Laureato Fifty Tourbillon Micro-Rotor 39: The Octagon Gets Its Most Serious Movement Yet

Four new calibers in 12 months. The latest drops a flying tourbillon and a micro-rotor into a 39mm Laureato case, and it looks the part.

Exclusive · Guide
Panerai Luminor Tourbillon GMT Titanio PAM01784: The Softer Side of a Big Complication

A tourbillon, a GMT, and a titanium case walk into a Luminor. The result is more restrained than you'd expect.

Pre-Basel 2015: Arnold & Son Constant Force Tourbillon Revolution
Arnold & Son Constant Force Tourbillon Ever Mar 4, 2015

Pre-Basel 2015: Arnold & Son Constant Force Tourbillon

Ever since the invention of the earliest water clocks, physics and gravity have affected our efforts to measure time precisely. Liquid-filled clocks ran faster when full, because higher pressure at the bottom of the vessel caused the water to drain more quickly. Springs provided a technological step forward, but not a complete solution, because they […]

SIHH 2015: Greubel Forsey Tourbillon 24 Secondes Vision Revolution
Greubel Forsey Tourbillon 24 Secondes Vision Feb 19, 2015

SIHH 2015: Greubel Forsey Tourbillon 24 Secondes Vision

Robert Greubel and Stephen Forsey have been called inventors first and watchmakers second. When visiting their manufacture, the diagrams and formulas that adorn many interior surfaces support this impression. The inventor reference is certainly no insult – the same might be said of Abraham-Louis Breguet. Greubel Forsey’s approach to watchmaking is, if not singular, certainly […]

Introducing - The Arnold & Son Constant Force 11 Platinum Edition Monochrome
Breguet s renowned tourbillon escapement Nov 20, 2025

Introducing - The Arnold & Son Constant Force 11 Platinum Edition

Friendships matter in life, and what better way to celebrate the bond between two of watchmaking’s greatest individuals than with a tribute watch? Bringing together Abraham-Louis Breguet’s renowned tourbillon escapement and John Arnold’s beloved fusée-and-chain system, lovingly replaced with a constant force mechanism, the Constant Force Tourbillon 11 made a deep impression when launched earlier […]

In-Depth: Balancing Mainspring Dimensions Inside the Barrel SJX Watches
Piaget Altiplano Tourbillon Concept Nov 7, 2025

In-Depth: Balancing Mainspring Dimensions Inside the Barrel

In a past story, we explained how multiple mainspring barrels can be paired in parallel or in series, for either lengthening a movement’s power reserve or increasing the torque discharged into the going train. In this article we expand on this topic to analyse the inside of the barrel by exploring how mainspring size balancing influences the torque output and power reserve.   Enthusiasts tend to throw around the loosely-defined term “mainspring packing” - especially when criticising a movement’s unsatisfying power reserve. This term refers to how a watchmaker can get a higher power reserve by balancing a spring’s dimensions and the space it occupies inside a barrel. While this sounds simple, the reality is more complicated.  Skeletonised barrel showing the tight coiled mainspring inside the Piaget Altiplano Tourbillon Concept. In order to set the record straight, it’s necessary to analyse the topic thoroughly. This requires getting a bit technical, but an interpretation is included for those less interested in the underlying maths. This theory-heavy deep-dive tries to unravel the concept of mainspring packing and explores why optimisation is not a very straightforward business. The core elements This section covers the basics of mainspring and barrel geometry and establishes their relation with power reserve and torque. In order to see how specific dimensions affect both torque and power reserve, we will resort to some known functions and a little geometric...