I wear the 22 carrot gold Omega whatch I bought with my first pay packet when I was 17. I am now 62 and I have worn it every day since, even got it pretty wet a few times. It is not waterproof. Apart from having it cleaned and dried a few times, it still works perfectly and you have to wind it up, which I like.
It is still accurate enough for me, gains about half a minute a day.
Three cheers for Swiss engineering