Great information in this thread. A few months back I noticed my 2019 126710 BLRO was running a bit slow. Moved on at the time, but stumbled across this thread and decided to test accuracy.
Simple method of syncing with apple watch and doing full winds every 12 hours, I ended up losing 10 seconds a day, dial up. Crown up & crown down were 12ish seconds behind. Sent it out to RSC Dallas a week ago to have it checked out since it was still under warranty.
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