“Historique Ultra-fine 1955” the world’s thinnest mechanical hand-wound watch measuring just 4.10 mm thick at the time of its release in 2010, is equipped with the mechanical hand-wound 1003 movement. This movement is one the thinnest in the world at just 1.64 mm thick, rebuilt – for its 55th anniversary in 2010 – in 18-carat gold, and bearing the Hallmark of Geneva
