Blending classic timepiece design with refined European style, this Omega Constellation men's chronometer automatic watch is comfortably at home in both the boardroom as well as the baccarat table. Mixing both stainless steel and 18 karat gold, this Constellation offers an appealing balance of luxury, durability, and precision, with its certified chronometer automatic movement awarded by the COSC (Swiss Official Chronometer Control). Its brushed silver stainless steel case is topped by an 18 karat gold bezel that features engraved Roman numerals in black and curved claw accents at 3 and 9 o'clock. The silver stainless steel bracelet band flows seamlessly from the case and is slightly tapered. It's accented by thin horizontal bands of 18 karat gold that separate the that separate the silver links and stretch fully across the width of the band. It's joined by a secure push-button safety clasp.. But Omega is more than just a fashionable watch. In 1965, the Omega Speedmaster chronograph was "flight-qualified by NASA for all manned space missions" as the only wristwatch to have withstood all of the U.S. space agency's severe tests, including passing grades for extreme shocks, vibrations, and temperatures ranging from -18 to +93 degrees Celsius. The greatest moment in the Speedmaster's history was undoubtedly 20 July 1969 at 02:56 GMT, when it recorded man's first steps on the Moon's surface as part of the Apollo 11 mission. Today, Omega is known for its rigorous testing of new movements, cases, and bands. Each new Omega movement is tested on the wrist in existing Omega models, while various laboratory tests are conducted to determine temperature-resistance, shock-resistance and vibration-resistance.