The A Michel 483 is a open face calibre watch movement that features a Breguet hairspring. It also offers the option of a Reed's regulator. The specific differences between the Felsa 160, 162, and 165 are unknown. It is worth noting that while the movement registers list only the open-face variant of the Felsa 161, Ronda additionally mentions the Felsa 160, 162, and 165. The functions of the A Michel 483 include stem wind and set, as well as sub second. This movement was commonly used around the period of 1932.