This highly exclusive limited-edition version of the Highlife Tourbillon Perpetual Calendar Manufacture is housed in a steel case just 41mm in diameter. Only 88 of these refined steel versions with a blue dial were produced; as is traditional for the Highlife collection, each will come with a number of interchangeable straps. Three will be provided for this piece: one in nubuck calfskin, one in steel, and one in rubber, allowing wearers to change their watch from a traditional to a sportier look as the fancy takes them, in just a couple of tool-free clicks.