The PRX's integrated-bracelet design dates to 1978, and this version adds a full chronograph to it. A black dial with index markers and a contrasting white date window holds two counters for 30 minutes and tenths of a second, plus a central chronograph seconds hand with ADD and SPLIT timing. The 41mm stainless steel case flows straight into the bracelet, with brushed and polished surfaces catching the light. Swiss quartz chronograph movement with end-of-battery indicator, sapphire crystal, and 100 meters of water resistance. Quick-change stainless steel bracelet with a butterfly clasp. Case thickness 11.65mm.