OMEGA Speedmaster Broad Arrow 1957 Co-Axial Chronograph 。Brand OMEGA Model Speedmaster Broad Arrow Olympics Gender Men\'s Material Stainless Steel / Stainless Steel Dial color white Movement Automatic Ref Number 321.10.42.50.04.001 Serial Number 7847**** Functions Date、Chronograph、Small seconds Accessories Guarantee(card) Case size About 42mm (1.7inch) (not including the crown) Wrist size About 17.5cm (6.9 inch) Lugs width 20mm(0.8 inch) Keeping time +11 sec/day(measured value)　※Reference value Guarantee information Blank State of the wound Glass few scratch (coating ) Case a few scratch Bezel few scratch Belt/Bracelet a few scratch Hand No damage Dial No damage Buckle few scratch CL Number 849730　JP 143 241217 MA Condition Rank Body rank AB+ Belt/Bracelet rank A Condition RANK Explanation N [Mint] Item has never been used. S [Beautiful] Item is like new withvery slight signs of use. A [Excellent] Item has clearly been used,but has no significant scratches or wear. AB [Great] Item has slight surface scratches or slight wear,but looks great. B [Good] Item shows scratches or wear that is visible when worn on wrist. BC [Fair] Item is not in perfect working order or slightly damaged. C [Poor] Item cannot be used as-is.Repair needed or used as parts.