Omega caliber 8400
No-date version of caliber 8500. Self-winding movement with Co-Axial escapement for greater precision, stability and durability. Resistant to magnetic fields greater than 15,000 gauss. Free sprung-balance with silicon balance spring, two barrels mounted in series, automatic winding in both directions to reduce winding time. Bridges and the oscillating weight are decorated with exclusive Geneva waves in arabesque.