Oris Big Crown ProPilot Day Date The new Oris Big Crown ProPilot Day Date is the first in a series of elite aviation timepieces. The back side of the new Oris Big Crown ProPilot reveals the new 752 calibre movement and Oris’ typical red rotor. The Oris Big Crown ProPilot Day Date’s bezel features a coin edged top ring, case back and crown reminiscent of an airplane's turbine jet engine.