At SIHH 2011, Officine Panerai launched a new diver watch with an unconventional case material, bronze. Bronze is an alloy made of copper and tin, or copper and another metal. In this case, Panerai used an alloy of copper and pure tin (CuSn8) , which is very resistant to corrosion. The new Luminor Submersible 1950 3 Days Automatic Bronzo (PAM00382) features an imposing 47 mm case, a case that over time will acquire a patina that shows its age, something collector's will surely appreciate. The movement is the in-house caliber P.9000, designed by Panerai in Neuchâtel. The caseback is sapphire, secured by titanium (because it is hypo-allergenic). A leather strap, with a vintage finish, and a titanium buckle is included. Limited to 1,000 pieces worldwide.