Omega Speedmaster Professional STZ005923

OMEGA SPEEDMASTER PROFESSIONAL Steel chronograph wristwatch, black dial, white minute track and luminescent hour markers, small seconds at 9 o'clock, 30-minute chronograph totalizer at 3 o'clock and 12-hour totalizer at 6 o'clock. Crown and crystal signed Omega. Steel bezel, black aluminum insert. Steel screw-down caseback signed Omega, reference STZ005923. Mechanical chronograph movement Omega calibre 1861 numbered 78776283, antimagnetic soft iron cage. Black NATO-type fabric strap, pin buckle signed Omega. Movement and chronograph functional at time of appraisal, but not guaranteed over time, condition of parts not guaranteed. Scratches from use, slight marks on bezel, scratches on glass. Circa 2005 Diameter 42 mm