Omega CK 859 Silver Dial Steel Case on leather strap 511.12.39.21.99.002 comes with Box and Papers Unworn.

Calibre: OMEGA 8926
Manual-winding movement with Co-Axial escapement.
Certified Master Chronometer, approved by METAS,
resistant to magnetic fields reaching 15,000 gauss. Small
Seconds display at 6H. Free-sprung balance with silicon
balance spring, two barrels mounted in series. Rhodium-plated finish with Geneva waves in arabesque.
Power reserve: 72 hours
CRYSTAL
Domed scratch-resistant sapphire crystal with anti-
reflective treatment on both sides
WATCH CASE & DIAL
Case: Steel
Case Diameter: 39 mm
Dial Colour: Silver
WATER RESISTANCE
3 bar (30 metres / 100 feet)
FEATURES
Anti-magnetic
Chronometer
Master Chronometer Certified
Numbered edition
Small seconds
Transparent case back