Plus my answer to an ultimate two watch collection
Timing measurements with a timegrapher: crown up -1, crown down -1, 12 up -2, 12 down +4, dial up +2 and dial down +1. Averaged error +0.5 secs per day.
Timing measurements with a timegrapher: crown up -1, crown down -1, 12 up -2, 12 down +4, dial up +2 and dial down +1. Averaged error +0.5 secs per day.