While the movement remained the IWC 375 the dial design was changed link slightly with shortened hour markers and logos simplified to read "Porsche Design by IWC" in block text at 800 on the dial. The crown now an interestingly ribbed texture reminiscent of a hand grenade was moved to 400 and the date at 300 is no longer color-matched to the dial. The case also has a link ribbed texture link on the sides.

The two escapements are link linked in the center by a differential mechanism to average out their rates which increases link the accuracy of the watch. Each tourbillon is driven by its own mainspring barrel the power reserve is 48 hours with the power link from the barrels carried by one gear train and then apportioned to the two escapements.