Bellusso Jewelers Blog

Bellusso Jewelers Blog

Renowned for its incredible work with Tourbillons (escapements that compensate for errors in timekeeping due to the effects of gravity when the watch is in certain positions on the wrist), Greubel Forsey now unveils one of its most beloved movements inside a totally transparent case. Meet the Greubel Forsey transparent Double Tourbillon 30-Degrees Technique Sapphire watch. Created in an incredibly limited edition of just 8 pieces, the watch is a United States exclusive, retailing for more than $1 million each.

The case is machined from a solid block of sapphire — a feat that requires diamond-tipped tools and hundreds of hours of time. The sapphire case allows for a crystal clear view of the complicated 396-part patented double-tourbillon movement. This patented caliber features one tourbillon cage inside the other, each rotating at different speeds (the outer one completes a single rotation once every four minutes; the inner one rotates once every minute). The result is a near perfect chronometry rating. In fact, Greubel Forsey achieved an unheard-of score for this movement of 915 out of 1,000 points at the International Chronometry Competition in 2011.


This year, independent watch brand Greubel Forsey turns 10 years old. It is a much celebrated birthday, as this is one of the more creative young watch brands ever to emerge on the watchmaking scene. We have several of the very exclusive Greubel Forsey watches in our store – something very few in the United States can boast. In fact, since Greubel Forsey only produces about 100 watches a year, very few in the world can say they carry the brand.

back of plat gmt

While all of the Greubel Forsey watches are special, one continues to turn heads: The Greubel Forsey GMT. First unveiled to the world in 2011 in 18-karat rose gold, the GMT is now available in platinum. The watch still holds all of its original magnificence – including the 24-second tourbillon with 25-degree incline and the wonderful rotating globe, the day/night indicator, world time display and more.

The caliber is comprised of 443 components that work together so harmoniously that one barely notices the precision, which is overshadowed by the beauty. In fact, the brand has 16 in-house artisans that spend between 50,000 and 60,000 hours a year simply hand finishing each piece and watch to complete the 100 total.

According to co-founder of the brand, Stephen Forsey, “We only make about 100 watches a year because we are limited by the superior hand finishing. It gauges how much we can produce. So we move slowly in our production numbers. But it is not volume we seek, but precision.”

OLYMPUS DIGITAL CAMERA Original Greubel Forsey in 18-karat rose gold.

The GMT is one precise and functional work of art. While most GMT watches offer a second time zone indicator via an aperture display or a hand, the Greubel Forsey watch shows it by means of a terrestrial globe that completes each counter-clockwise (the direction Earth spins when looking down from the North Pole) rotation in 24 hours.

A lateral window set in the case offers a viewpoint over the Southern Hemisphere. The second time zone indication is at 10:00, and the back of the watch showcases the universal time for 24 zones (and summer time indications) through an original rotating disc. In short, it’s a real statement maker.