[USMCJS]

I picked up a ladies Rolex (I hope) at an estate sale some years ago, gave it to my wife and it's been in a drawer since. Today, she was going through her watches and I asked to look at the "Rolex". When I picked it up and moved a bit, it started working. I changed the date and time and it's working great. The second hand is a sweep second hand not like a quartz movement watch. It has a tight screw down crown and the dial and crystal are perfect. I do not have the tools to get the back off. There are no markings on the back of the watch case but there are markings on the band clasp. I would appreciate opinions on whether it's real or not. Thanks.