Olivier Industries ® White Logo on Automatic WatchSize Guide Metric Diameter, mm 46 Thickness, mm 12. 5 About No Battery Required Designed For Unisex 3ATM Water resistance Classic Analogues make your every second count! Running by high quality automatic mechanical movement, without battery supported. Accurate timing, suitable for business and casual occasions. Key Features Automatic Mechanical Movement High quality automatic mechanical movement, easily rotates the collision avoidance lock down crown,