Oris BC4 Small Second, Pointer Day

The Oris BC4 Small Second, Pointer Day, reference 01 645 7617 4174-07 8 22 58, has a 42.7 mm steel case rated to 100 metres, with a steel bracelet and 22 mm lugs. A central hand indicates the weekday on the black dial, alongside a date window beneath a sapphire crystal domed on both sides. Small seconds occupy a subsidiary display. Self-winding calibre 645 keeps a 38-hour power reserve within the case, which has a see-through back.