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large balance wheel measuring 12.6mm, set at 7 o’clock and inclined at an astonishing angle, immediately catches the eye. Is it inclined for purely aesthetic reasons?
To think so would be to do misjudge Greubel Forsey, who have been experimenting for a number of years now with this unusual position, notably in their Double Tourbillon 300.
“To start with, the large diameter of the balance is a factor of stability. By slanting it at an angle of 30° to the horizontal, we limit the differences in speed due to the effects of terrestrial attraction on the balance spring and escapement,” explains Stephen Forsey.
So the aim of this Balancier S – the ‘S’ standing for Sportif – is to achieve unparalleled chronometric performance. The open-worked dial, with its imposing bridge in the shaped of a suspended arch and its integrated wheel train, also inclined, expresses the sought-for dynamic.
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- With its two series-mounted coaxial barrels, the movement comprising a total of 308 components has a power reserve of 72 hours at 2 o’clock.
This powerful personality, further reinforced by the red arrowheads of its two hands and a surprising smallseconds dial at 8 o’ clock on the inclined plane of the platform escapement, is set in a highly original case in titanium.
Seen from above, it looks round, but it is ovoid when viewed from any other angle, and endowed with a broad engraved bezel and integrated lugs, while the sides of the case and the crown have protective rubber inserts.
As we have come to expect from Greubel Forsey, the finishing is excellent: textured decors, polished angles and mouldings, and satin finishes at every level of this truly three-dimensional watch.
