The new Breguet Marine Équation Marchante 5887 watch — cased in choice of platinum or rose gold — features a running equation of time, a perpetual calendar and a tourbillon. Undoubtedly the star of show for Breguet this year (Baselworld), this impressive new grand complication is unmistakably inspired by A.L. Breguet’s unique heritage in timekeeping in general and marine chronometry in particular. The “equation of time” is one of the rarest and also fascinating horological complications due to its abstract nature for most. It serves to display the difference between mean solar time, corresponding to civil or standard hours and minutes, and true solar time, meaning the actual solar hours and minutes. The new Marine Équation Marchante from Breguet takes it one step further simultaneously indicating civil time and true time by means of two separate and easy-to-read minutes hands. While an impressive feat in and of itself, what would a Breguet grand complication be without the brand’s defining complication, a tourbillon? And further, a perpetual calendar? Yes, the Marine Équation Marchante 5887 has them both. Full breakdown on this superb new piece from Breguet, below.