Tough call partly because what you describe as art can be done on the cheap by stamping something on the dial or actual hand painting. And the subject matter is also pretty subjective.
I'm sure there are cheap Chinese watches with cheap movements and stamped "art" that can be had pretty cheaply and then there are higher end watches with good movements and hand painted dials that are in the stratosphere.
Good luck in your search but your criteria should possibly be better defined.
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