Available in two versions - 18-karat red gold (Ref. CH-8421R) or Stainless steel (Ref. CH-8423) and equipped with an automatic movement, the Chronoswiss Sirius Big Date Small Seconds boasts a small seconds counter at 6’o clock and a big date window at 12’o clock.
CH-8421R: 18-karat red gold
CH-8423: Stainless steel
Central hours, minutes, and seconds; big date window at 12:00, small seconds at 6:00
Solid case in red gold or stainless steel; polished bezel with side knurling, full thread and anti-reflective sapphire crystal
Screw-down case back with full thread and sapphire crystal
Screw-in lugs with patented Autobloc system
Water resistant to 3 bar
Measurements: Ø 40 mm, height 10.35 mm
Chronoswiss Caliber C. 284, automatic
Diameter: Ø 29.40 mm (approx. 13´´´)
Height: 5.35 mm
Balance: Glucydur, three-legged
Balance spring: Anachron
Fine adjustment: Eccentric
Shock protection: Incabloc
Frequency: 4 Hz., 28.800 vph (semi-oscillations)
Power reserve: Approx. 42 hours
Special features: Skeletonized, rhodium-plated rotor with côtes de Genève and ball bearing; polished pallet fork, escape wheel and screws; plates and bridges with perlage
Solid sterling silver dial (925), guilloché
Hands: Thermally blued and polished; Breguet shape
Louisiana alligator leather
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