This model El Primero Stratos Flyback Striking 10th Tribute to Felix Baumgartner is totally unique. It is the 1st watch to break the sound barrier on the frontiers of space. Worn on Felix Baumgartner wrist during the Stratos Mission, this timepiece was in direct contact with the atmosphere. This watch owns an exclusive 1/10th of a second display: the chronograph hand makes 1 turn in 10 seconds. The case-back is engraved with the Stratos mission logo and with Felix's motto.