OMEGA Speedmaster Chronoscope

Omega's Speedmaster Chronoscope, reference 329.30.43.51.02.002, is a chronograph in a 43 mm steel case. Thickness runs to 12.8 mm with a lug-to-lug span of 48.6 mm. The dial is silver and sits under a sapphire crystal treated with anti-reflective coating on both sides. Inside is the manual-winding calibre 9908, a column-wheel chronograph with a Co-Axial escapement and Master Chronometer certification, resistant to magnetic fields up to 15,000 gauss. A tachymeter scale surrounds the dial, and a small seconds counter joins the chronograph displays. The transparent caseback shows the movement. Fitted to a steel bracelet with a foldover clasp and comfort setting, the watch carries a 50 metre water resistance rating.