I'm rough on watches. I've given up on wearing pretty jewelry-type watches and usually wear what I call plastic watches. One for EST and one for Daylight Savings Time since I can't set either one of them.
But back when I was smarter and also was eventing, I needed a good, tough watch to keep me at the right pace on course. I'd always check my time at the half-way point, but would be so excited that I'd forget what my half-way-point time was supposed to be so I'd just keep going. (Lily has advised me that I should have written it down in ink on my skin. Good idea! Too bad she wasn't born yet so she could have helped me.)
Those watches didn't last all that long. If I needed one now, I'd look into getting a G-shock casio watch There are a bazillion of these Casio G-Shock watches to choose from, some having atomic timekeeping and solar power features. And they're supposed to be super-tough, horse-proof and horse-woman-proof. I'll bet if I followed the instructions (and didn't throw those instructions away) I could even work them.