not identical to yours but take a look at the differences for a similar watch
http://uhrforum.de/tag-heuer-monaco-cw2113-t38309#post508280
note the engraving on the case back, the tag logo is richer, & the numbers are engraved slightly lighter. And it has a beautiful mechanical movement in it. The one you have is a replica................ BUT this could be a very sentimental watch to someone, maybe a recently departed left to a son or daughter. Would be ashame to pass it on for a fast buck.
Hand it into the police & if its not collected it will become rightfully & legally your friends. If its collected it might be with some relief to the owner. (imo)