The ETA 2367 watch movement, produced from 1949 to 1950, is the first automatic-family movement for gents featuring a ball-bearing rotor. Variants of this movement were developed due to the simultaneous introduction of a modified caliber and the shift from T- to U-shaped shock devices. While it is unclear if all calibers were produced in the TC variant, the known variants are listed. Notably, even signatures of UT versions were changed to UC. In addition to being automatic, the movement exhibits sweep seconds and a date function.