Hi Barton, Congratulations on the beautiful Grand Seiko! Comparing rate results with other owners of this watch/movement is a bit challenging for us to arrange, as their accuracy should all be measured in the same way in order to compare. From my personal experience, Grand Seiko is very focused on this and delivers amazing accuracy, so I think I might know the answer to this question already. What we can do is highlight in the (near) future, how Grand Seiko is developing and making these movements. Thanks again for your kind response and great suggestion! Martin Green