The Kienzle 051A53 is a hunter calibre watch movement that features a Breguet hairspring and can be equipped with an optional Reed's regulator. It shares similarities with the Felsa 160, 162, and 165 movements, although the exact differences between them are not specified. The Kienzle 051A53 is primarily found in open-face variants, as indicated in movement registers. It offers functions such as stem winding and setting, as well as a sub-second display. The Kienzle 051A53 movement was commonly used in timepieces produced around 1935.