Please note this is an Ex-Display watch This 40 mm timepiece features a steel case, white dial, and sapphire crystal case back. Powered by the mechanical self-winding BM13-1975A COSC movement, it includes a date function, 4 Hz frequency (28,800 vph), and a 120-hour power reserve. Finished with a self-interchangeable black calfskin leather strap. • Powered by the chronometer certified automatic movement. • Presented on a black leather strap with traditional buckle. • Scratch resistant sapphire crystal glass. • 40mm case width. • 50 metre water resistance.