Le Régulateur Tourbillon Louis Erard x Alain Silberstein Black in a limited edition of 78 pieces unveils a new collaboration between the watch brand and the designer, who have been working together since 2019. The tourbillon, the pinnacle of the art of watchmaking, the pinnacle of Alain Silberstein's thinking, has never before been offered as a single piece but only in a triptych. Neither on a black background, that color which is not one, but on which all the others are revealed.