The Omega 1155 watch movement, manufactured during the period of 1958-1960, features a micro rotor and utilizes a detached manual winding system. With Girocap combined settings for the escapement wheel, the movement enables a low profile design. Additionally, it incorporates indirectly driven minute and second hands. This movement includes multiple functions such as automatic winding, sweep seconds, and a calendar feature where the date can be adjusted by changing the 21-24 hour time.