And take it to him when it is misbehaving so he can see what you are seeing.
There are many who can fix our watches, not just the original dealer.
A first-hand inspection is the only way to confirm your observations, relieve your mind, and get a real diagnosis.
Your watch uses a Lemania movement decorated for Breguet (the companies are now merged together).
It "the motor" doesn't "go bad" no matter what the salesperson implies.
Good luck
Cazalea