Mechanical Movement * Manual Winding * 19 Jewels * Date Calender * Day-Night Indication * Shock Protection * Power Reserve 42hr * Case Diameter 45 mm * Water Resistant 50 Meters * LA-5 Fighter Airplane Was One Of The Most Easy-To-Handle Fighters With A High Speed & Exceptionally Good Maneuvering Ability. Aviator LA-5 Inherited Simplicity & Strictness Of The Aviation Watches Of That Epoch. This Simplicity Makes This Line Of The Watches Unique & Original.