Omega Pre-owned Speedmaster Professional Moonwatch Ref 3572.50.00 Chronograph is a stainless steel chronograph from circa early 2000s featuring a hand-wound Cal. 1863 movement and an exhibition (glass) case back. It is in good condition with visible signs of wear on the case, bracelet, and glass; the Omega stainless steel bracelet has slight stretch and a folding clasp. Key attributes: Black | Stainless steel | Hand-wound movement Cal. 1863 (+10 s/d, 303° amplitude) | Chronograph function (three totalizers) | Tachymeter scale for speed measurement | Omega stainless steel bracelet with folding clasp | Exhibition (glass) case back | Black dial with stick indices | Three totalizers and small seconds | Tachymeter bezel | Dimensions & fit: Fits wrists up to approx. 19 cm | Bracelet shows slight stretch | Composition & care: Stainless steel | Glass | Wipe with a soft cloth; avoid prolonged exposure to water; have movement serviced by a qualified watchmaker.