Seiko 5M63-0AK0 Watch Guide The Seiko 5M63-0AK0 is a watch model based on the 5M63 movement.Caliber 5M63Other models with the same movement5M63-0A105M63-0A205M63-0A305M63-0A405M63-0A505M63-0A605M63-0A705M63-0A805M63-0A905M63-0AA05M63-0AB05M63-0AC05M63-0AD05M63-0AE05M63-0AF05M63-0AG05M63-0AH05M63-0AJ05M63-0B005M63-0B105M63-0B205M63-0B305M63-0B405M63-0B505M63-0B605M63-0B705M63-0B805M63-0B905M63-0C005M63-0C105M63-0C205M63-0C305M63-0C40