I am very fond of tuning fork watches. While they are electric, the technology is differnt from Quartz and has a kind of school / analogue charm. I have a couple of them, a few also sold. I particularly like the Eternasonic.
If you buy from a good seller, who offers a warranty, you should be fine. Just check the same as on mechnical watch, like all functions are operating correct, timekeeping, and of course the originality and condition of dial, hands, case, crown, caseback and movement.
Best,
Stefan
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