I have a few questions about watches! I inherited the Heuer Autavia GMT in another thread and learned a bunch about it thanks to the input from this board. While learning about it, some questions about watches in general came to mind. First, I hear about certain movements that are in different brand watches with very different price tags. Like some mention the Valjoux 724 movement in my GMT. Then the same movement is mentioned in a Rolex and other brands. So does each brand manufacture their own movements in house? Or is there a Valjoux company providing them to the various brands? Would the Valjoux 72 from Heuer fit in the Rolex? Are some better quality or more durable than others? Next question is with regards to winding a manual watch. How should you wind it? How long should it take to wind a watch? Do you wind it to where it stops every day? Or let it run down all the way every once in a while? I was having to wind my GMT for over 20 minutes every day. I am told that is a sign that it needs service. Unfortunately the last time I wound it last week, I went all the way to where it stopped. I was curious how long a full winding would last. It stopped about 13-14 hours after that but now it won’t wind at all. I try to wind it and the crown won’t move clockwise at all. It will move counter clockwise and if I pull the crown out it will adjust the hands but now it won’t wind. Being new to watches I really don’t know much about them. Especially mechanical watches. I wore a watch years ago when I was diving a lot but I have never been big on jewelry and since I always had a phone with the time on it I never really felt the need to invest into a quality watch. Since inheriting a couple, I am appreciating them more and wearing them make me think of the family members who wore them in the past. Thank you for your input!