Oris Watch ProPilot Big Crown ProPilot Big Day Date Leather 01 752 7760 4065-07 5 22 08LC. Since they produced their first pilots watch in the 1930s, Oris has pioneered a number of innovations that have made them a favourite among flyers. Boasting a cool, clean and classic look, this Oris Big Crown ProPilot Big Date watch is no exception and is inspired by the world of aviation, an industry which Oris has had a passion for since birth. The 41mm stainless steel case and coin edged bezel are inspired by powerful jet engine turbines while the clear dial and bold hands are reminiscent of aircraft dashboards and their easy legibility.