I have about a half dozen 7750s, ranging from 1 year to 7 years old. I used to wind all of them every day. I did that for years, without a problem. After being informed that its not really a good idea to manually wind any automatic movement, I stopped. If you do need to wind it, do it very slowly, and only about 30 turns. I have found that hacking my watches is much easier. When ! put it on, I set the date and time and I'm good to go, and always with a full power reserve.