And there is the reality of selling rare items already there in an off sentence ... if you where to sell one of these coins without a paper trail that could proof where you got it from ... well it would raise some questions. In an heist movies you can of course wave that away with the collector hiring for that job ^^ and i think you could make quite a dramatic movie out of it ^^ or you could make the second half of the movie about the hijinks trying to sell something that shouldn't exist xD,(reply>), @Ragnhild In for a Penny, 4 old university chums plan a heist when one realises a photo of the King laying a foundation stone is printed in reverse meaning it wasn't  destroyed in the blitz allong with the now valuable coin collection  inside.,(reply>), @Aaron Paul <br>I know it’s hard, hence my best suggestion being terrible.,(reply>), @Ragnhild Naming stuff is hard. Its one of the reasons why so many projects have a work title because you can spend a long time on it without any progress xD,(reply>), What would this movie be called? The best I can come up with is “the problem of provenance”, which doesn’t sound all that exciting.