Accuracy
How many seconds a day your watch gains or loses, heard through your phone’s microphone.
Maurice de Mauriac · Zurcher Chrono Modern Full Stahl Smaragd Grun
ChangeZürcher Chrono Modern Full Stahl Smaragd Grün
Somewhere quiet, lay the watch caseback up on something soft. Rest the bottom edge of your phone on the caseback and keep both still.