Officine Panerai Radiomir Regatta SplitSeconds and Foudroyante... The case, in titanium, measures 47mm. The crystal is an AR-coated sapphire and it is water resistant to 100 meters. Movement is the automatic Panerai chronograph caliber OPXXI with 40 jewels, 28,800 vph and a power reserve of 42 hours. The chronograph can time to 1/8th of a second. It is hand decorated with perlage and Cotes de Geneva finish.