"All movements in the Oris current range are produced by ETA. Balance wheels, escapements and finishes are produced by ETA to accommodate Oris specifications.
Several movements have modifications which are specific to Oris and are based on developments made by Oris
581 calendar mechanism
644 seconds at 9 o’clock, calendar mechanism
645 seconds at 9 o’clock, calendar mechanism
649 regulator arrangement of hands
654 calendar mechanism
690 World timer mechanisms
Note: the alarm clock 7320 is not made by ETA the base is Pontifa 7320 but I believe that these are old stock movements"
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