Item number: 321.12.42.50.01.001
Brand: Omega
Style Number: 321.12.42.50.01.001
Series: Speedmaster Broad Arrow
Style: Mens
Case: Stainless Steel
Dial Color: Black with Gray Subdials
Watch Bracelet / Strap: Leather - Brown
Watch Clasp: Stainless Steel deployant twin-button safety clasp
Movement: Automatic Co-axial
Engine: Omega 3313
Functions: Hours, Minutes, Small Seconds at 9, Date, Chronograph
Watch Chronograph: 30 minute totalizer at 3 o'clock, 12 hour totalizer at 6 o'clock. 
Crystal: Sapphire - Scratch-resistant, domed, anti-reflective, multi-layered
Case Diameter: 42.0 mm
Case Thickness: 13.5 mm
Caseback: Stainless Steel
Bezel Material: Stainless Steel
Bezel Function: Fixed
Water Resistance: 100m / 330ft (suitable for swimming and shallow snorkeling; unsuitable for diving)
Crown: Screw-down stainless steel fluted & protected crown
Calendar: Automatic Date at 6 o'clock
Power Reserve: 55-hour Power Reserve