It’s sort of hard to unravel what’s part of the brand, it’s all imagination anyway.

The watch manufacturer, as part of their reputation, buys “premium” internal components. And then the hardcore watch-heads get to know that this model has that premium movement. Everybody in the club gets to signal to each other by knowing internal details that outsiders don’t notice (or even details that can’t be noticed, I mean, I assume by nowadays non-premium-brand movements are functionally identical to the premium ones).