BULOVA A339 Elegant Design Stainless Steel Case Quartz Movement Water ResistantProduct Highlights The "CURV" collection, featuring the world's first curved chronograph movement, celebrates its 10th anniversary with a new standard model that pursues an evolved style and comfortable fit. The case size has been reduced from the traditional 44mm to 41mm. Maintaining an excellent fit, it has been designed to be worn by anyone, regardless of gender. It features a push button mechanism for easy one push band attachment and detachment.