Case Diameter 40mm Diameter - 50mm Lug-Lug. Features a blue color 3-time zone dial &/or 2-time zone & elapstime indicator using the internal rotable dial external control knob @ 2 o'clock. Easy- read date indicator @ 12 0'clock. Sub-dial above 6 o'clock position functions as a second time zone indicator controlled by the external rectangular push switch @ 4 o'clock. The GMT dial indices are lummed in yellow as is the minute hand. Watch also features a low battery indication that moves the second hand @ two second intervals about a week before the battery goes tits up. Ruggedized stainless-steel case & bracelet.