Blancpain caliber 3863
Blancpain caliber 3863 is a self-winding movement with perpetual calendar, moon phase, and equation of time complications. It consists of a total of 397 parts including 39 jewels. This movement is finished and engraved by hand. It was one of the first wristwatch movements with a 'Equation du Temps Marchante' - showing the solar time in real time through a second minute hand.