Big Crown ProPilot X Calibre 115 is a wristwatch by Oris.

In the summer of 2019 Oris presented this completely new designed model with an open dial, which reveals the view of the skeletonized manufacture caliber 115. The watch has the high power reserve of 10 days. The non-linear power reserve indicator is patented by Oris and is controlled by a “worm gear”, an exclusive innovation from Oris.