Hermle Model 141-020 is a fourteen day pendulum movement with the ability to strike the half hour. Long single hammer (3 1/2" Long) is mounted on the bottom and front of the movement. 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 21, 32, 38, 45, or 55 cm length options.