The Unitas 286 watch movement is considered to be quite equivalent to the Aurore-Villeret 120, Bulova 6AH, and FHF 120 movements. There are conflicting reports regarding their interchangeability in various movement registers. However, only calibres mentioned in multiple registers as derivatives of these base calibres or those that could be verified for equivalence are listed. The Bulova calibres have additional design details that are absent in the FHF calibres, suggesting that the ebauches likely originated from Aurore-Villeret. It is unclear what differences, if any, exist between the 120, 123, 132, and 172 calibres, but these may potentially represent official designations for varying plate shapes. The Unitas 286 movement offers manual winding and is available in both sweep seconds and non-sweep seconds variations.