Timex Marathon Digital Watch 42mm. The 42mm case and black silicone strap come together to complete your new favorite digital watch. Specifications for Timex Marathon 42mm Digital Watch: Manufacturer: Timex Gender: Unisex Band/Strap Color: Black Case Color: Black Case Material: Silicone Case Diameter: 42 mm Band/Strap Material: Silicone Wrist Band Type: Strap Package Contents: Timex Marathon 42mm Digital Watch Timex TW5M20900: Marathon Digital Watch 42mm