The unabashed star of Greubel Forsey’s 2018 SIHH presentations was the GMT Earth, which enables a simultaneous view of three separate time zones and features an enchanting three-dimensional titanium globe showing universal time (both summer and winter) on the back.

Greubel Forsey GMT Earth

Universal world time zones on the back of the Greubel Forsey GMT Earth

“We’ve imagined even more visibility for the GMT’s earth,” Stephen Forsey said referring to Greubel Forsey’s previous GMT model. And right he is!

Greubel Forsey Différentiel d’Égalité

Greubel Forsey’s other big introduction was the absolutely stunning Différentiel d’Égalité, which features the brand’s fifth invention, a differential that – in a nutshell – ensures constant amplitude of the balance wheel (and therefore more precise timekeeping).

Back of the Greubel Forsey Différentiel d’Égalité

The Différentiel d’Égalité also features first for Greubel Forsey: dead beat seconds.

For more information, please visit www.greubelforsey.com/en/collection/gmt/gmt-earth and/or www.greubelforsey.com/en/collection/differentiel-degalite.

Quick Facts Greubel Forsey GMT Earth
Case: 45.5 x 16.8 mm, white gold
Movement: manually wound caliber with 453 components, 24-second tourbillon inclined at a 25-degree angle, 72-hour power reserve thanks to two coaxial serially operating fast-rotating spring barrels, variable-inertia balance, 3 Hz/21,600 vph frequency
Functions: hours, minutes, seconds; power reserve indication, second time zone, 24-time zone universal time
Limitation: 33 pieces
Price: 610,000 Swiss francs

Quick Facts Greubel Forsey Différentiel d’Égalité
Case: 44 x 15.3 mm, white gold
Movement: manually wound caliber with 359 components, 60-hour power reserve thanks to two serially operating fast-rotating spring barrels, variable-inertia balance, 3 Hz/21,600 vph frequency, spherical différentiel d’égalité providing uniform torque, 30-degree inclined fixed escapement
Functions: hours, minutes, zero-reset hacking dead beat seconds; power reserve indication
Limitation: 33 pieces
Price: 265,000 Swiss francs