Bulova Curv Leather 98a155Bulova Curv known for the first curved chronograph watch, with the first curved sapphire crystal. The watch features high performance quartz movement with 262kHz vibrational frequency for precise accuracy. The watch is made out of stainless steel with a black leather alligator grain strap, also has a black metallization on the outer crystal, and black rubber band Movement: High performance quartz curv Chronograph Case Diameter: 43mm Case Thickness: 9.