Very clean original late 1960s Rolex Chronograph example, commonly referred as the Pre-Daytona. Perfect original dial retaining all its tritium indexs, and matching original hands set. Clean thick case, only lightly worn. Sharp Valjoux Rolex Caliber 72B running perfectly, all chrono functions spot on. Equipped with a newer Rolex Oyster bracelet, optional, reference 78350-571.