Hello everyone, this is my first post on these forums. I found a *truly spectacular* (to me) vintage Omega timepiece inside a drawer in my house, which probably belonged to my father or my grandfather. It looks to be working perfectly, manual winding will give it the amount of power it needs to go through a day or two and I am really happy with it. Now, here's my three questions: 1) Is there any chance of damaging this particular timepiece mechanism by overwinding it? How much winding is required (or recommended) for this type of timekeeper? I read that you have to give something like 40 movements until it's fully wound, but I will ask for confirmation anyway (I know this question is asked all the time, but there's just so many people who have never owned a mechanical watch and will need some "guidance"). 2) May I know what model is it exactly, based on the picture? Unfortunately, there is nothing written on the dial nor on the caseback and I have found no pictures of similar models online.* 3) If I were to change the strap, which I probably will have to, how may I find a "compatible" one? Suggestions? *The timepiece is not in pristine conditions, but even so I am afraid of prying the back open to find out more about it, even if such operation was to be performed by a skilled watch repairman. Is it necessary? In which case, can you explain how to do it and which tools are needed? Is it something I can do myself or do I have to bring it to someone more experienced? Thank you!