I may not have qualified for a seat in Westminster Abbey for the coronation, but a couple of weeks ago I found myself at an event that was its equivalent in terms of horological heft.

In place of the soaring, vaulted nave of the medieval church, celebrants gathered under a large, transparent PVC marquee pitched in an idyllic mountain meadow on the fringes of the small village of Le Brassus, 3,000 feet up in Switzerland’s Vallée de Joux, the traditional heartland of Swiss watchmaking.