![Rating Assembly 3" (10593184591)](http://perrinwatchparts.com/cdn/shop/products/76.4763-300_300x300.jpg?v=1595351687)
Rating Assembly 3 3/4" has a 3 3/4" threaded rod with an adjusting nut. Rating Assembly 3" can be adjusted to control the rate of swing of the pendulum.
Rating Assembly 3 3/4" has a 3 3/4" threaded rod with an adjusting nut. Rating Assembly 3" can be adjusted to control the rate of swing of the pendulum.