F300's are great watches but only if you get a good one.
First, you can't call them quartz. They are totally different beasts. The only similarity between the two is that the mechanism that drives the watch is powered by a battery.
Now, more importantly, these things are susceptible to wear the same as a mechanical watch but they also have electronic components. Those components are now more than four decades old ... and they fail. This is on top of the sort of issues that you can find in all vintage watches, like corrosion. Most of these components are still available, either new or recovered, but there's no promise that you can find what you need easily. There are only a handful of people around the world who specialise in these watches but at least two of them are members of the forum. Hopefully they'll chime in and make themselves known to you. These are all things you need to bear in mind if you're considering buying.
If you are going to buy, do it one of two ways: buy a cheap one in the full knowledge that you can easily sink £3-500 into bringing it back to full working order and treat it as a gamble; or, pay much more on a fully serviced and working example with a warranty from a dealer or collector. The early ones, in good order, are starting to appreciate. A good 198.00(0)1 or similar in full working order, with service history, good case etc is starting to break the £700 mark. That said, I bought one a few months ago and (I think) I paid about £35 for it. I sank over £300 into bringing it back from the dead, though. Still not the wrong side on value.
You will find yourself stopping and looking at or listening to the watch when you catch the distinctive hum from the mvoement. Go find a nice one and save it for future generations.
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