Learn more about Water Resistance.

Close 50m/167ft Case Back Transparent Band Material Stainless Steel Color/Finish Brushed & Polished Clasp Push Button Folding Clasp Clasp Features Push-Button Quick Micro Adjustment Lug Width 20mm Movement Manual Wind – Chronometer Manual Wind Movement: The movement is powered by a thin spiral torsion spring, called the mainspring, which is housed in a barrel inside the movement. The mainspring needs to be wound manually, typically via the crown of the watch. Once the spring is wound the energy from thetension-release of the mainspring drives the movement functions. To ensure uninterrupted operation of the watch, the watch will require rewinding before the mainsprings completely winds down. Most manual-wind watches will have a 35-45 hour power-reserve, yet some might have less & some significantly more, check the specs on each watch to verify the power-reserve duration. Close Complications Chronograph COSC Certified Yes

• Brushed & polished stainless steel case.
• Brushed bezel with atachymeter scale.
• Black textured dial.
• Sandwich construction dial with cut-out index hour marker and with vintage colored luminous backing.
• Polished hands.
• Broad-Arrown hour & minute hands with vintage colored luminous fill.
• Fine printed minutes/seconds & fractions of a second track.
• Small seconds sub-dial at 9 o’clock.
• Date window at 6 o’clock.
• Chronograph/Stopwatch functions:
• Column-wheel and vertical clutch mechanism.
• Large central seconds counter hand.
• Minute & hour counters are combined into a single sub-dial at 3 o’clock.
• Movement:
• Omega manual winding calibre 9906, beats at 28,800 vph (4Hz), contains 45 jewels * has a power reserve of 60 hours.
• METAS Certified Master-Chronometer: The assembled watch, with its COSC certified Chronometer movement, passes rigorous tests that replicate real-life conditions. The METAS certification tests water resistance, precision and magnetic resistance.
• Anti-magnetic: resistant to magnetic fields greater than 15,000 gauss.
• Features Omegas Si14 silicon balance spring & Co-Axial Escapement.
• The back-plate is rhodium plated & decorated with Geneva waves in arabesque design.

Mens Omega 332.10.41.51.01.001 Speedmaster ’57 Chronograph 40.5mm Watch