The Big Crown ProPilot Altimeter was introduced at Baselworld 2014. The ProPilot features an altimeter which indicates the altitude in meters. One of the special features is that it is able to show the change in altitude in more or less real time. The watch measures the air pressure through an aneroid capsule system and based on that, decides the altitude. It features an integrated Swiss mechanical barometric altimeter and barometer movement (developed with the specialist Thommen).Reference 01 733 7705 4184-Set 5 23 14FC is a limited edition of 500 pieces introduced in 2016 in honor of the Groupe d’Intervention de la Gendarmerie Nationale, known as GIGN, the French police force’s elite special operations unit.
