Development of High-precision Automatic Mechanical Ladies’ Watch

Abstract

  We developed a high-precision automatic mechanical watch. We aimed at a thin watch which has high automatic winding performance. To achieve these requirements, we adopted a new design of going train in which a barrel and a third wheel don’t overlap. In addition to that we expanded a gap between a third wheel and a balance to reduce viscous resistance of a balance. Furthermore we employed a reverser wheel whose unresponsive angle is small. With those efforts, we achieved a high-precision, thin watch with high automatic winding performance.