Could someone advise on winders for this

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IMG_1450.jpeg Hi, this is a watch I own and for some reason I can no longer open the case. I need to buy a new winder (it fell out) - I think it is a 701 movement based on old photos. What winder would it need?
 
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I believe what you need is a watchmaker to do a service and install a new crown and stem as part of that service. If you don’t have a watchmaker, let us know whereabouts you are and someone may have a recommendation. If that’s what you want, then edit your post’s title and you will get the help you need