To me, the answer is always depends.
To me, I would wear a a watch that the original question won't even come to my mind. I would much rather enjoy the vacation than to think about if a watch is ok to wear at certain time, or in certain part of the city.
Having said that, get a Grand Seiko / Casio MRG. Those are exceptional watches that nobody else would give a flyin' F to.
You can feel and see the quality on your wrist, but not necessarily flashy.
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