The Hermle 1161-850CSK Replacement Mechanical Movement is an 8-day cable-driven movement for grandfather clocks. The hammers are mounted on both sides of the chime rod unit. It has Westminster, Whittington, and St. Michael triple chime capabilities, and chimes on quarter-hours and strikes out the hours. Specifications: Dimensions: 200 x 140 mm, with an internal distance of 32 mm between the plates. Weight Requirements: Time Train: 7.7 lbs Striking Train: 7.7 lbs Chiming Train: 9.9 lbs Handshaft: 33.2 mm. Winding System: Winding Crank. Uses a #8 hand crank. Automatic beat adjustment. 12 Hammer back. Also compatable with Emperor, Howard Miller, Sligh, Ridgeway, Seth Thomas, Pearl, King Arthur and other popular manufacturers.