One thing you brilliantly demonstrated is that accuracy is proper ti a watch, not to a rule.
I mean that even the same COSCED watch form the same manufacture won't show the same accuracy.
There are tolerances, due to the COSC, and some watches are better than others, within this tolerances.
While reading you, I even felt a romantic dimension...The watch doesn't work as well than before since its owner decided to give it some rest, to the benefit of another watch...
I love this idea tha,, like humans, watches - even of the same family - have their own rythm, character, ...accuracy?
Very good post, Marcus.
Thanks for the reading!
Nicolas