Greubel Forsey Quadruple Tourbillon Secret

Movement:

• Manual winding manufacture movement, 21,600 A/h
• Balance spring with Phillips terminal curve
• Four independant tourbillons in two double cages
  • Inner tourbillons inclined at a 30° angle, 1 rotation per minute
  • Outer tourbillons 1 rotation in 4 minutes
• Double barrel
• 63 jewels
• Olived-domed jewels in gold chatons
• 509 components
• Power reserve 50 h

Case:

• Red gold or platinum
• Ø 43.5 mm, H 16.11 mm
• Sapphire crystal, domed, and transparent asymmetrical caseback
• Lateral window with shaped sapphire crystal
• Relief engraving of the name of the invention on the manually hammered caseback
• Waterproof to 3 atm

Dial:

• Gold multi-level either black (red gold version) or silvered (platinum version)
• Gold hour markers
• Gold display sectors

Functions:

• Hours, minutes
• Two inner minute tourbillons, 30° inclined, two outer tourbillons with 4 minutes circulation time, hour and minutes, small seconds and power reserve indicator via arc

Bracelet:

• Black hand-sewn Alligator strap with folding clasp

Limitation:

• 8 pieces in red gold and 8 pieces in platinum