First I do not think that a basic watch falls under 'Fine Watch'
But I think that when a timekeeper reaches a certain luxurious price, then it too falls under a fine watch.
One would want to ensure that it is made to match mechanical tolerances, as well as guaranteeing that it is assembled in a clean environment, and, that it reaches the end users as specified!
I find and hear too often, that after purchasing a fine watch, one had to send and resend a timepiece, because dust, hair, particles were find inside, or that it gain or losses minute(s) within 24 hours etc... They must be a way not to leave the full bill and time to the customer, do not you think?
Yves.