I've actually been wondering how much of a bearing that has on the Cal 8500, the early Rolex Calibres like 15xx series are heavily influenced by position, and my 7750 SMPC is as well but the current 3xxx series Rolex movements and the reports I've read of the Cal 8500 shows them very close in all positions. I can sort of imagine the co-axial escapement having some bearing on that in the Cal 8500, but I'm not sure why the new Rolex Calibers are also dramatically less variable in different positions
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