The Oris Big Crown ProPilot Calibre 114 is the latest expression of Oris s long-standing ties to aviation it made its first pilot s watch in the early 1910s and also the first watch to carry the independent Swiss company's innovative in-house developed Calibre 114, which features a 10-day power reserve, a non-linear power reserve indicator and a 24-hour second time zone. Functionality-Multifunction Movement-NA