Oris gents big crown propilot altimeter with feet scale watch more than 75 years after oris made its first pilots watch the company is proud to announce the launch of the most innovative pilots watch in its history the oris big crown propilot altimeter the worlds first automatic mechanical watch with a mechanical altimetermovement automatic power reserve 38 hours case stainless steelcase diameter 47mmstrap black textile dial black water resistance 100m