Oris BC4 Flight Timer

The Oris BC4 Flight Timer, reference 01 690 7615 4164-07 5 22 58FC, is a GMT watch with a 42.7 mm multi-piece steel case, a see-through back and a leather strap with 22 mm lugs, water resistant to 100 metres. Beneath sapphire domed on both sides, the black dial shows a second time zone at 3 o'clock and small seconds at 9 o'clock. The calendar has a quick-set date, while a rotating bezel surrounds the dial. Self-winding calibre 690 maintains a 38-hour power reserve.