Speedmaster 40.5 mm

Antimagnetic: The movement resists magnetic fields in excess of 1.5 tesla (15,000 gauss).
Master Chronometer certification: This certification guarantees the highest level of precision, performance and magnetic resistance in Swiss industry, as established by the Swiss Federal Institute of Metrology (METAS).
Chronograph: The chronograph function is a mechanism for measuring time intervals. A chronograph watch can therefore time events while continuing to indicate the time in the same way as a traditional watch.
Chronometer: Designation of a watch that has passed precision tests and received a certificate from an official organization (the COSC).
Date: The day of the month, displayed in an aperture on the watch dial at 3 or 6 o’clock, or in a counter at 9 o’clock.
Time zone function: Allows the hour hand to be easily set to two time zones, without stopping the watch.
Transparent back: A transparent back, often sapphire, allows the movement inside the watch to be seen.
Small seconds: Sub-dial hand marking the seconds. It usually completes one full rotation in one minute.
Tachymeter: A tachymeter watch has a speed-measuring function. It is a chronograph with a graduated dial on which the user can read the speed in kilometers per hour over a distance of 1,000 meters.

Reference number: 332.10.41.51.11.001
Lug spacing: 20 mm
Height horn to horn: 49.64 mm
Case diameter: 40.5 mm
Case: Steel
Dial color: Red
Glass: Scratch-resistant sapphire crystal with double-sided anti-reflective coating
Water resistance: 5 bar (50 metres / 165 feet)
Total product weight (approx.): 134 g
Caliber: OMEGA 9906
Movement type: Hand-wound
Power reserve: 60 hours

Material: Steel
Clasp type: Deployment buckle with ease of use