A just question. Very just question and thoughts about watches.
To me, Dufour Simplicity is a great one, but the finish quality is, well, my apologies in advance, really varies. My two were not so different - I would rate 8 ~ 8.5 (out of 10), but I saw an example which clearly even for the non-watch person looks, well, again, my apologies for the lack of better words, "ugly", the watch sales rep who saw it rated 5 out of 10.
This is just an example and in a way it may be an aspect that attract independnets' hand made pieces. But those who picked the not-great ones may not be happy - although in the case above, even the owner of 5-rated Simplicity seemed ecstatic, maybe from the fact he got it finally.
Finishing is important, how important may defer among collectors. But those which I feel the passion and feel the time the watchmaker spent on would certainly excite me, regardless of the brand. On the other hand, If/when I find the finishing cut the corner, I would be very disappointed and even depressed depending on how much it cost
My own thoughts on the "value" determinants of the watches are:
1.How much time the watchmaker or watchmakers spent on the watch, from design to finishing.
2. Whether it also focuses on the practical side in design - legibility and ease to use. Of course, Metier d'art is another story.
3. And the "market sentiment". It's some kind of "fashion" or "hype" or whatever you call it, and it greatly affects the value.
4. Vintage? I do not know much about this topic, so I cannot comment. Unless it has been in my possession in its entire life, I just can't be sure of its authenticity for its originality. Even the brand's certificate doesn't seem to mean much to some vintage fans. Beyond my comprehension.
So, back to "finishing", when it sings, it is really the matter of how much or immediately those 1 and 2 sink or osmose in my mind. 3. is important when I need to sell something, of course

)
Thank you for raising this topic, Imran. Very thought provocative and helped me streamline my own way of thinking about it.
Best,
Ken