Star wars empire strikes back signed poster here is a star wars empire strikes back signed movie poster 61x915cm personally signed by dave prowse who played darth vader in the first three films at a signing session carried out and attended by allstarsignings in london 11th feb 2015 the item comes with an allstarsignings certificate of authenticity which will have photographic proof inserted into it signed poster 61 x 915cm framed certificate of authenticity empire s