So Iโm by no means an expert at this either, as Iโm still finding my own way to weight different movements. However, my understanding so far is that a lot of it has to do with reputation and prior usage. Both of which only come with experience.
A Miyotawhatever movement might be preferable to a Powermaticsomething because an experienced watch collector will be able to recognize what other watches house either a Miyota or Powermatic movement. And if those other watches are known to be robust and excellent, then thereโs a pretty good chance that the watch housing this Miyota or Powermatic is also likely to be robust and excellent.
Sure, you can look at the case back of any see through watch case back to admire the tiny gears and springs, the details, the finishing, etc. That all matters, too. But really, at the end of the day I think youโre buying certain movements because theyโre known in other watches to be dependable.
Itโs sort of like buying a car. Sure, the color, shape, interior all matter in your purchasing decision. But youโre buying a Honda over a Maserati because Hondas are known to be dependable. They have easily replaceable parts, they service well, etc.
Now, granted, I think thereโs a lot of commonality between a movementโs reputation and the brandโs reputation itself. Rolex has such a great reputation not just because of its historical prestige, but because the brand is known to make a damn good watch, regardless of whatever movement is inside the case.
So I think if youโre unfamiliar with the brand, the type of movement used inside of it should give you a pretty good idea of how dependable the engine driving the car is. Has it been used in other stellar cars? Yes? Then youโre good to go.