One of my all-time favorite Swiss watches "on the cheap" was Wittnauer. The "poor man's" Longines, it is often maliciously marketed by eBay sellers as a Longines because of the relationship they had. It was proudly engraved inside the watch cases and printed on the boxes and marketing materials: "A Longines-Wittnauer Product."
Make no mistake, a Longines is a superior watch movement by far. But Wittnauer had a variety of very attractively styled watches and dials. Many movements (in the 60's) were A. Schild movements. These were sturdy and reliable, and parts still seem to be available for many (of course as time passes the parts for any vintage piece get harder to source).
Be wary of the case diameter-some can be small. Many were at 33mm, which is small for my taste currently, but still fit my 7.5" wrist well.
Most (heck, I think all) of the examples I picked up from the 'bay were under $100. And most were automatics. Just know when it comes time to sell, you'll feel like the only collector that ever appreciates them.
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