Quadruple Tourbillon Secret

Dòng đồng hồ Quadruple Tourbillon Secret cao cấp nhất của Greubel Forsey (2014)-greubel-forsey-quadruple-tourbillon-secret-watch-www.donghothuysy.net-2.jpg Dòng đồng hồ Quadruple Tourbillon Secret cao cấp nhất của Greubel Forsey (2014)-greubel-forsey-quadruple-tourbillon-secret-watch-www.donghothuysy.net.jpg

Reference number: 9100 0328

Movement: manually wound, Caliber GF03j; 36.4 mm, height 9.85 mm; 63 jewels; 21,600 vph; variable inertia balance; 2 double tourbillion cages each with 4-minute and 30 degree inclined 1-minute tourbillon linked to spherical differential; 2 spring barrels; 50-hours power reserve

Functions: hours, minutes, subsidiary seconds; power reserve indicator

Case:
pink gold, 43,5 mm, height 16.11 mm ; sapphire crystal; transparent case back; water-resistant to 3 atm

Band: reptile skin, folding clasp

Remarks: 4-minute tourbillon indicator on dial

Price: $830,000, limited edition of 8 pieces