Good morning! Don't miss this one, a very interesting Article on Hodinkee, not only on dials age but moreover heading towards a general discussion about condition and perception of restoration. https://www.hodinkee.com/articles/aged-watch-dials-good-investment-or-ticking-time-bomb
Well, glad it was reposted as I had missed the article-- and whatever discussions took place around it... so thanks to the OP.