Accuracy
How many seconds a day your watch gains or loses, heard through your phone’s microphone.
Maurice de Mauriac · Chrono Modern BIG DATE Bugatti Veyron Grand Sport Vitesse
ChangeChrono Modern BIG DATE „Bugatti Veyron Grand Sport Vitesse“
Somewhere quiet, lay the watch caseback up on something soft. Rest the bottom edge of your phone on the caseback and keep both still.