Oris has chosen to commemorate Brashear, who passed away in 2006, by creating a watch using bronze – a metal associated with vintage diving helmets. Bronze is traditionally valued for marine applications because the copper in bronze readily forms a patina that protects the underlying metal from corrosion; a patina will naturally form on the case of a bronze watch, with each patina having a unique appearance. (Such patinas can, however, stain or discolor skin if in direct contact with the body, which is why bronze watches generally have a stainless steel or titanium case back.) The watch is 42 mm in diameter (as opposed to the 40 mm case of the standard Divers Sixty-Five) and is made in a limited run of 2,000 pieces. The automatic movement is an Oris Caliber 733 based on Sellita SW200, with date.