With Greubel Forsey Certificate of Authenticity, Certificate de Grand Service, loupe, polishing cloth, gloves, leather wallet, fitted presentation box and outer packaging.
The groundbreaking Quadruple Tourbillon à Differential encapsulates the pioneering advances of the Greubel Forsey, boasting an impressive four separate tourbillons that are separated into two regulating organs, connected by a spherical differential which calculates median precision for the time display. Each regulating organ comprises a balance wheel oscillator placed in a cage of a first tourbillon that is inclined at 30 degrees and rotates once a minute, this mechanism is then placed within a second tourbillon that rotates every four minutes. This horological masterpiece is quipped with a 50 hour power reserve via two fast-rotating barrels that transmit their energy to the two regulating organs using the spherical differential. The construction and adjustment of these three-dimensional multi-axis whirlwinds is pure artistry in the realm of high complications.
Furthermore, this watch is fitted with a special red Roman XII numeral dial.