Overhauled clockwork from Christiaan Huygens grandfather clock. Stamped on the back Hermle 1151-053 the clock has 12 hammers and various chimes.(Westminster, St. Michael or Whittington). The pendulum length on the clockwork is given 85 cm. The clockwork is overhauled has had service and bushings replaced where necessary. Good to go for another 40 years. See clock it was taken from, clock is not included in the sale.