Breitling B10

The Breitling B10 is an automatic movement based on either the ETA 2892-A2 or Sellita SW300-1, beating at 28,800 vibrations per hour with a 42-hour power reserve and 21 jewels. It uses a ball bearing rotor with Incabloc shock protection. A distinctive feature is that identifying which base caliber is used requires opening the case, earning it the nickname "Forrest Gump movement" among collectors. The movement is non-manufacture, produced for Breitling by third-party suppliers, and has powered watches from the 1980s through recent models including the SuperOcean Heritage.