Hermle Model 141-040K is a fourteen day pendulum movement with the ability to strike the hour and half hour. One hammer is mounted on the rear top of the movement. Has calendar gears. The German movement is New Old Stock (NOS) and recommend that the movement be lubricated prior to use. The new German movement is out of Hermle warranty. Select from 11, 23, 27, 38, 43, or 55 cm length options.