How Things Work on Instagram: "The Hublot LaFerrari watch winds through a barrel system driven by an external winding tool, because the movement has 50 days of power reserve and the mainspring is far too strong to wind comfortably by hand. Instead of turning the crown dozens of times, the watch comes with a small electric drill-style winder made by Hublot. You insert a keyed shaft into a socket on the watch case, and the tool spins at a controlled speed so the mainspring barrels wind evenly with