Oris BC4 Flight Timer

The Oris BC4 Flight Timer, reference 01 690 7615 4154-Set LS, is a GMT watch with a 42.7 mm steel case with a see-through back and rotating bezel on a leather strap with 22 mm lugs, water resistant to 100 metres. The black dial presents a second time zone and small seconds beneath a domed sapphire crystal. A quick-set date window adds a calendar indication to the dial. Self-winding calibre 690 has a 38-hour power reserve.