When tradition meets innovation, the result is not always so harmonious. The simplicity of the lines of the Jazzmaster Power Reserve contrasts with the strength of the new H-13 movement that beats inside. The power reserve scale is the only indicator of the extraordinary 80-hour driving range offered by this model. For the Jazzmaster Power Reserve, Hamilton created the new H-13 movement with an enhanced 80-hour power reserve, which is displayed on the dial through the power reserve indicator. The movement is expertly decorated and is visible through the transparent caseback.