Greubel Forsey Double Tourbillon 30° Technique
Greubel Forsey Double Tourbillon 30° Technique Red Gold
© Greubel Forsey
Greubel Forsey Double Tourbillon 30° Technique Blue
© Greubel Forsey
Greubel Forsey Double Tourbillon 30° Technique Sapphire
© Greubel Forsey
Greubel Forsey Double Tourbillon 30° Technique Ceramic
© Greubel Forsey
Double Tourbillon 30° Technique is a luxury wristwatch by Greubel Forsey.
See:
Greubel Forsey's first invention, presented in 2004, was an innovative double tourbillon mechanism (DT30), with one tourbillon – inclined at 30° and rotating in 60 seconds – inside another rotating every four minutes, to average out gravity-induced errors on the oscillator.
Reference:
Movement:
- Manual winding manufacture movement, 21,600 A/h
- Two tourbillons, the inner inclined 30°, with circulation time 1 minute, the outer with circulation time 4 minutes
- Four coaxial series-coupled fast-rotating barrels (1 turn in 3.2 hours)
- 43 jewels
- Olived-domed jewels in gold chatons
- 396 parts
- Power reserve 120 h
Case:
- Black edition: Black ADLC titanium
- Blue edition: Titanium, platinum or white gold
- Ø 47.5 mm, H 16.84 mm
- Sapphire edition:
- Ø 49.95 mm, H 17.15 mm
- Sapphire crystal domed and transparent caseback
- Waterproof to 3 bar
Dial:
- Black, openworked
Functions:
- Hours, minutes, small seconds
- Power reserve indicator via circular arc
Bracelet:
- Black hand-sewn alligator strap with folding clasp
Limitation:
- 22 pieces
- Blue edition: 33 pieces
- Sapphire edition: 8 pieces, only US market
- Ceramic edition: 11 pieces, only US market