The Hermle 461 series clock movement is either chain or cable driven. They have three weight, and is a Westminster chime unit. It is the same movement as the 1161 series, but it only plays Westminster instead of being a triple chime. In other words it plays one song instead of three. Westminster is the most popular song among the Grandfather and Grandmother clocks. The 461-853 is the most common among this series. In fact, it is also the most produced 461 series movement. This particular Hermle Clock Movement is a Westminster chime unit with three weights that hang on cables.