Vacheron's new timepiece has bags of power (until you put it on)

In watches, the debate about power reserve is coming to a head As more people have multiple watches, the challenge of keeping them wound, so they don't have to be reset every time you decide to wear a different watch, is resulting in a consumer demand for longer power reserves Advertisement The "Standard" power reserve of 38-45 hours is laughably insufficient in modern watchmaking.

At the SIHH in Geneva earlier this year, one company, Vacheron Constantin, introduced a breakthrough watch that has revolutionised how people look at power reserve - the Traditionnelle Twin Beat Perpetual Calendar "For me, it's thinking completely out of the box when considering long power reserve watches," says Christian Selmoni, style and heritage director of Vacheron Constantin Radical new materials are fueling a new wave of watch innovation.

"When you select standby mode, you still have the timekeeping and the perpetual calendar continues to operate All the information has to remain correct, so we use several differentials in the system In order to get 65 days of power reserve, you have to put the Twin Beat in a flat position - you can't wear it because the chronometry will suffer if you do.

It was a matter of finding the best compromise between the longest power reserve possible and great accuracy when you are wearing it." In 5Hz mode, the power reserve is still a respectable four days The Vacheron Constantin Traditionnelle Twin Beat Perpetual Calendar is a huge step forward in addressing the issue of power reserve. . Source