Mechanical Movement * Manual Winding * 17 Jewels * Date Calender * Shock Protection * Power Reserve 42hr * 45mm case diameter, 12mm depth* Water Resistant 50 Meters * Mineral crystal * 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.