Case material: Steel; Charge: Manual; Conditions: New Presentation condition : With dealer guarantee ; Model: Speedmaster Professional Price on request Gmtbroker Reference: 311.30.42.30.01.004 Omega 311.30.42.30.01.004 Complete Details: The Speedmaster Professional Moonwatch:   Brushed and polished stainless steel case. Stainless steel bracelet with alternating brushed and polished links. Black aluminum fixed bezel with a tachymeter scale. Red and white checkerboard motif surrounding the dial. Black dial with recessed black subdials and white hands filled with luminescence. Chronograph/Stopwatch functions: Large white central seconds counter. 30-minute sub-dial counter located at the 3 o'clock position. 12-hour sub-dial counter located at the 6 o'clock position. Small running seconds sub-dial located at the 9 o'clock position. Built with the famous Omega Caliber 1861 manual winding chronograph movement which was worn on the Moon. Power reserve: 48 hours. Stainless steel case back engraved with red lettering: FLIGHT-QUALIFIED BY NASA FOR ALL MANNED SPACE MISSIONS - THE FIRST WATCH WORN ON THE MOON Featured Complications: Chronograph This watch is also known as 31130423001004