Omega Speedmaster Mens Watch 3520.53. Omega Speedmaster - Mens 3520.53 Watch: Stainless steel case and hidden clasp bracelet, 25 jewel Swiss automatic movement, black dial, day-date-month, 24 hour dual time, AM/PM indicator in blue and black subdial at 9:00, water resistant to 30m. Case Diameter: 37mm. Case Depth: 14mm. Bracelet Dimensions: 8 inches x 18mm