Three Reasons Why the Greubel Forsey Tourbillon 24 Secondes Architecture Is One of the Best Watches in the World

Stephen Forsey and Robert Greubel

Greubel Forsey’s CEO, Antonio Calce
Magnificent Chronometry
When it comes to the new Greubel Forsey Tourbillon 24 Secondes Architecture, even though it is a mind-blowing, cool, game-changing scorchingly sexy timepiece the likes of which the world had never seen, what you should understand is that its fundamental raison d’être is purely horological. Why incline a balance wheel at 25 degrees? This is to minimize the times that the oscillator will find itself in the pure vertical — the position which is the worst for concentric breathing of the hairspring and friction on the escapement. In contrast, for a traditional watch with a deployant clasp, setting it on its side essentially places the balance in a vertical position for as long as you leave it there. Why have the tourbillon cage rotate every 24 seconds? Well, the faster the revolution of your cage, the more frequently the errors created by gravity are averaged or compensated for. To me, it’s perfectly fine if you want to buy this absolutely stellar watch simply for its design — which we will discuss later — but I also want you to know that the asking price of the watch is ultimately reflective of real horological innovation and, of course, the crazy level of hand finish.

Greubel Forsey Tourbillon 24 Secondes Architecture

While the case measures a hefty 47.05mm in diameter, the Tourbillon 24 Secondes Architecture being made almost solely of Grade 5 titanium, feels incredibly light on the wrist.

The three-dimensional case and movement of the Tourbillon 24 Secondes Architecture in all its glory
Radical Dimensionality
What exactly is the Greubel Forsey Tourbillon 24 Secondes Architecture? Well, it’s just about the most beautiful tourbillon I’ve set eyes on this year. The name of the watch comes from the fact that the entirely grade 5 titanium movement is an architectural revelation. It essentially takes the concept of skeletonization into the third dimension. What you see looking at the watch is, of course, the famous Greubel Forsey 24-second tourbillon inclined at 25 degrees, and the equally iconic barrel housing the watch’s mainspring. Both of these are suspended on three-dimensional curved bridges that seemingly emerge from nowhere to reach through space and appear in front of our eyes. Says Antonio Calce, Greubel Forsey’s CEO, executive board member and shareholder, “This new caliber embodies all Greubel Forsey codes and signatures such as the exceptional quality and finishing on each and every geometrical components but also one of the 7 Fundamental Inventions invention, the Tourbillon 24 Secondes. This timepiece has a lot of depth, volume with a tri-dimensional architectural movement and highlights the true excellence of Greubel Forsey! The Tourbillon 24 Seconds is synonym of true creativity.”

With sapphire crystal inlaid into the caseband, the architecture of the movement can be seen from the sides, not just the front and back (Image: Revolution©)

The titanium main plate is frosted with polished bevelling and gold countersinks (Image: Revolution©)

The 354-part hand wound movement has two patents and a chronometric power reserve of 90 hours.

The bridges of the barrel and tourbillon each requires a week to achieve a flawless mirror polish.

The Tourbillon 24 Secondes, one of seven Fundamental Inventions by Greubel Forsey, as seen through the sapphire crystal between the lugs at 6 o'clock.

Greubel Forsey Tourbillon 24 Secondes Architecture
Tech Specs
Greubel Forsey Tourbillon 24 Secondes Architecture
Movement: Manual winding Greubel Forsey caliber; 90-hour power reserve
Functions: Hours and minutes, small seconds and 24-second tourbillon
Case: 47mm (caseband diameter) and 45mm (bezel diameter); grade 5 titanium; water resistant to 50m
Dial: Three-dimensional with variable geometry hour ring; Super-LumiNova filled indexes
Strap: Black rubber; titanium folding clasp
Price: SGD 706,200
Availability: Limited edition of 11 pieces in 2022; thereafter, limited to 18 pieces per year worldwide from 2023 to 2025


