The Oris 648 is a detached manual wind watch movement that was produced during the years 1966-1969. It belongs to the family of movements 360/1360, which differs from the 260/1260 family in terms of the balance and mobile stud carrier. The Oris 648 movement includes functions such as automatic winding, sweep seconds, day and date display, and a calendar. The day can be set by adjusting it within a +/- 24-hour range, while the date can be set by changing the time between 20-24 hours.