When you say "best vintage find", I'm not sure if you mean one's favorite, or the watch on which we got the best bargain.
My only two vintages..
I bought a box of old wrecks at auction in the countryside for a few years ago. I was very surprised when I found this at the bottom of the box. Bezel was missing and it was generally dirty and very scratched at the plastic glass. My incredibly talented watchmaker made the Speedy in perfect condition again. Even bracelet ref 1039 was in good shape after one wash. And I pay only 10 USD for it at the auction. Not every day you make such a deal.