Calibre 403
Oris Calibre 403
Calibre 400 Series_Anti-magnetic


Swiss watches can be magnetised, affecting accuracy. Oris' Calibre 400 Series uses over 30 non-ferrous, anti-magnetic components for high anti-magnetism. Tests by Laboratoire Dubois showed Calibre 403 deviated under 10 seconds a day after 2,250 gauss exposure.

400 Series_Five-day power reserve

Five-day power reserve

Mechanical watches stop if not worn daily. Oris' Calibre 403, with a five-day power reserve, is ready when you are. It achieves this via twin barrels with extended mainsprings. It's highly accurate, to -3/+5 seconds a day, surpassing a chronometer.

Calibre 400 Series_10-year warranty

10-year warranty

Oris offers a 10-year warranty on watches powered by the Calibre 400 Series, reflecting confidence in their advanced technologies. Registration at MyOris is required for the warranty extension. Oris also recommends 10-year service intervals for these watches.

Technical details


Centre hands for hours and minutes, subsidiary second at 6 h, date centre hand, instantaneous date, date corrector, fine timing device and stop-second
120 hrs
Power reserve
  • Number
    Oris 403
  • Dimensions
    Ø 30.00 mm, 13 1/4’’’
  • Winding
    Automatic winding, uni-directionally rotating rotor
  • Vibrations
    28’800 A/h, 4 Hz