The A. Schild 1665 watch movement is a detached manual wind movement. It has a frequency of either 18000 or 21600 A/h, with the 558 variant having only been found with 21600 A/h so far. The significance of the HJP signature instead of HPP on some samples remains unknown. Not much is known about the differences between the 450 and 460 movements. The movement features automatic winding and a sweep second hand. These functions were produced around 1970.