Omega Broad Arrow SS/Strap


Omega, Speedmaster Chronograph, Broad Arrow, Reference: 3851.20.12, Stainelss Steel on a Strap with a Stainless Steel Deployant Buckle, Automatic, Date, Chronograph, COSC, Blue Reflective Hands and Markers, Luminescent Hands, Small Seconds at 9 O'clock, Diameter: 42 mm, Thickness: 14 mm, Sapphire Crystal, Water Resistant, Like New with Box and Papers.

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More about Broad Arrow SS/Strap

This is a stainless steel Omega Speedmaster Chronograph Broad Arrow 3851.20.12. It has leather strap with an Omega stainless steel double deployment buckle, and a scratch resistant sapphire crystal. It has a protected screw down winding crown, round chronograph push buttons, and a solid screw down caseback engraved with "BROAD ARROW-SPEEDMASTER," with the speedmaster seahorse logo in high relief in the center medallion. The 42mm diameter solid three-body case, straight lugs, and flat bezel with a tachymeter scale to 1000 UPH, are polished/brushed. The dial is white with reflective applied faceted blue baton hour indices, dot hour markers, luminescent blue broad arrow hands, a center sweep second chronograph hand with a counter balance, and a perimeter black minute/second scale. There are three recessed white subsidiary dials with black scales and indicators, and Arabic numerals, including a running small seconds dial at the 9 o'clock position, a 12-hour chronograph totalizer at 6 o'clock, and there is a 30-minute totalizer at 3 o'clock. A date aperture window is at 6 o'clock, and it's water resistant to 100 meters/330 feet. It has a 55-hour power reserve at full wind, and a Certified Official Superlative Chronometer rating. The 14mm thick case, dial, and movement are all signed. This Omega Speedmaster Chronograph Broad Arrow 3851.20.12 has a mechanical automatic Omega caliber 3303 movement, a base pre-coaxial version of Omega's column-wheel chronograph movement based on the Piguet 1285 ebauche. It's rhodium-plated, with fausses cotes and Geneva wave embellishment, 33 jewels, a straight-line lever escapement, and a shock absorber mechanism. It includes a monometallic balance that's adjusted to 5 positions, a self compensating flat balance spring, and a hacking seconds mechanism for precision time setting. The mechanism oscillates at a frequency of 28,800 vph (4 Hz). The Omega Speedmaster Chronograph Broad Arrow 3851.20.12 was introduced in 2002.

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