The 101-A21 Automatic GMT is meticulously engineered with the heritage of our iconic Holton Professional military issue model. Built for precision and endurance, it boasts a robust shock protection system that guarantees the reliability of its GMT automatic movement, even in the harshest environments. • Powered by the automatic movement with a power reserve of up to 40 hours. • Presented on a brown leather strap with traditional buckle. • Scratch resistant sapphire crystal glass. • 43.0mm case width. • 200 metre water resistance.