>>228775idk about the Seiko 5 but I wouldn't say that there is anything inherently delicate about mechanical watches. the only time I hurt mine was using a hammer drill all day. even then it just popped a spring loose at some point and ran fast. I took it to the repair shop and the guy just popped the spring back on. he didn't even charge me. I think it was just a freak thing as I've used the hammer drill again without remembering to take it off. I think the only real down side is having to pay for regular maintenance every 3-5 years.
old pic is related.