Panerai has crafted this limited edition of five pieces in honour of Explorer, environmentalist and brand ambassador Mike Horn. Fittingly, the new EcoPangaea™ high-tech steel for the case uses metal that was repurposed from the propeller shaft of Horn's sailing ship. The metal was purified and perfected prior to being shaped into the 50mm case of this new Submersible, which comes equipped with a unidirectional rotating bezel plus a soft iron ring that shields the movement from magnetic fields. Water-resistant to 300 metres, this GMT watch incorporates Panerai's 30-second tourbillon which rotates perpendicular to the movement. Power is provided by Calibre P.2005/T, a skeletonised titanium movement whose three barrels deliver six days of power reserve. The five lucky owners will join Mike Horn on a once-in-a-lifetime expedition to the Arctic.