A tribute to the 1972 Chronograph I and the 1980s Titanium Chronograph (one of the first titanium watches), the Porsche Design Chronotimer Series 1 trumps both of its predecessors by being the first timepiece series developed solely by the company’s Swiss design team. Visible through a blackened sapphire crystal caseback, the watch’s ETA Valjoux Caliber 7750 movement features an exclusive Porsche Design rotor and has a 48-hour power reserve. The dial (with date at 3 o’clock) is enclosed in a case made of …