Power Trip
Greubel Forsey pushes on or reffinement in mechanical watchmaking
greubel forsey created its Différentiel d’égalité with the purpose of improving timekeeping accuracy. What makes the watch more interesting is that it houses a deadbeat seconds complication — a first for the brand.
A product that took some 10 years in the making, it has a differential system that receives energy from the mainspring barrel and releases it to the regulator in consistent amounts every second. This delivers a steady distribution of power from the mainspring barrel to the regulating organ throughout the 60-hour power reserve.
With the remontoir spring winding and releasing energy every second, it allowed Greubel Forsey to incorporate a deadbeat seconds. So as to set time precisely against, say, a reference atomic time, the watch comes with a balance wheel stop and seconds reset feature. An inclined balance wheel and escapement minimise the debilitating effects of gravity on the accuracy of timekeeping. This luxe-must with a 44mm white gold case is limited to only 33 pieces.
Well-loved by watch enthusiasts since its debut in 2011, the GMT has experienced several aesthetic revamps but this year’s GMT Earth could be the most elaborate yet. Occupying some serious wrist estate at 45.5mm by 16.18mm, it is chock-a-block with technical innovations like its predecessors: A 24 seconds inclined tourbillon, GMT time, world time with Daylight Saving Time, and that 3D globe that spins every 24 hours.
What’s different now is that the globe can be admired in its entirety from the North to the South Pole, thanks to the ingenious use of sapphire crystal. Meanwhile, turn the white gold case on its side, and you can spot an engraving of the brand’s “statement of purpose”.