Hamilton H42405191 Jazzmaster Skeleton Lady AutoProduct Overview The Jazzmaster Viewmatic Skeleton Lady showcases the movement of the H 20 S caliber's hairspring, escapement, and mainspring, creating a display of time as it ticks away. This piece expresses all of Hamilton's craftsmanship through its skeleton dial. Specifications Product Number H42405191 Caliber H 20 S Collection Jazzmaster Movement Automatic Case Size 36mm Thickness (mm) 10. 9 Dial Color Mother of Pearl Case Material Stainless