Black Bay is 15 seconds fast after 24 hours

[DJJon]

Funny how there are regular posts about how non-important COSC is with Rolexes, but then when a Tudor doesn't carry the COSC certification there's all sort of agreement undergoing COSC makes Rolexes better for having it.

I like the definition of expected performance that a COSC cert brings to the owner. Now we all realize that meeting COSC is not particularly hard for a watch movement manufacturer to achieve in today's world, which is not the point. The point is the OP is dissatisfied at +15 sec/day and really has no direct manufacturer's claim that his watch is failing to meet.