My information on this comes from Charles Eagles, an avid Rollei collector of many years' standing. If you find a Rollei with this inside it, it should prove that the camera really is mint and unused. Apparently, they stopped putting the ribbon and seal inside in around 1957. Don't remove it - according to my informant at Jessop's Classic Cameras (London), you'll probably reduce the value by around 30%! The picture shows a Rolleiflex T.