Self-winding Swiss automatic movement never needs batteries. Generous polished steel case has a spphire crystal skeleton back that reveals the watch's intricate automatic movement. Stainless steel case is presented on handsome black lizard strap. Polished steel bezel frames the signature black Museum dial with silver colored Dauphine hands and the Movado concave dot. Scratch resistant sapphire crystal. Water resistant to 30 meters (100 feet). Case is approx. 42 mm in diameter and 8 mm thick. Strap is approx. 21 mm wide. 