Accuracy
How many seconds a day your watch gains or loses, heard through your phone’s microphone.
Maurice de Mauriac · Zurcher Chrono Modern Bronze Big Date Smaragd Grun
ChangeZürcher Chrono Modern Bronze “Big Date” 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.