Took my Alpha Radiomir Chronograph swimming today, gotta say I'm impressed. For a "delicate" mechanical chronograph it did perfectly with all the splashing around and rapid movement. And even more surprisingly it did not leak. It's rated to 5 ATM, the crown and pushers are not screw down, and it has a display back. I swam a good 30 laps freestyle, then I just hung around the bottom just to get as much pressure on it as possible. After about an hour of this with no leakage, I decided to push the boundaries and I pushed the chrono buttons underwater, I started, stopped, and then reset the chrono underwater. Still no leakage, that was over two hours ago and not even a little condensation. Now I don't recommend doing this, and I probably got lucky, but I am very surprised it could handle swimming even. Now that I found out this is water resistant enough for everything I'll ever do, I think it'll become a daily watch, one I can wear to the beach, around the house, if I'm going out, and it suits all occasions. The point of me sharing this is to show you that these things aren't as delicate as we may think. Even an Alpha with less than stellar quality control, a known delicate movement, low water resistance rating, a display back, and a non screw down crown or pushers can handle more than just light rain.