1731

In 2009, Vacheron Constantin embarked on creating a new minute repeater that balanced slenderness, acoustic purity, aesthetics, and reliability, a challenge that took four years to resolve. Although the Calibre 1731 is slightly thicker than its 1993 predecessor at 3.90 mm, it remains the thinnest on the market while offering a 65-hour power reserve. It features a silent flying strike governor, a mechanism that uses two weights to stabilize the striking cadence by counteracting the barrel spring's energy, all finished with the brand's signature Maltese Cross.