Greubel Forsey Quadruple Tourbillon Secret
The movement comprises 519 components of which 261 make up the four tourbillon cages and is powered by two mainspring barrels which provide an effective power reserve of 50 hours. The oscillators feature variable inertia balance wheels, Phillips terminal curves and beat at 3Hz/21,600 APH. The plates and bridges are in nickel silver finished in nickel-palladium with straight-grained and spotted finishes and hand polished bevels. The dials are in blackened or silvered gold with applied indices. The case is available in platinum 950 or 5N red gold and measures 43.5 mm in diameter by 16.11 mm high and features asymmetrical domed synthetic sapphire crystals on the dial side and for the display back. The black alligator strap is hand stitched with a folding clasp in platinum 950 or 5N red gold to complement the case.