Your one-minute primer to the Hermès Slim d'Hermès Quantième Perpétuel.

Credit must be given to Hermès for keeping the minimalist aesthetic of the Slim d'Hermès intact while endowing it with a mechanism as complex as a perpetual calendar. Previously available only in rose gold, the new version comes in platinum and a handsome blue dial hosting hours, minutes, moon phase, second time zone, and day/night indications in a traditional yet uncluttered fashion. Most remarkably, its 39.5mm case still manages to keep a slim profile, largely thanks to an ultra-thin (4mm thick) manufacture movement with a micro winding rotor.