The Franke and Heidecke factory makes an appearance in some 16mm film recently sold on eBay: http://www.ebay.com/itm/16mm-FILM-1940s-HOME-MOVIE-GERMANY-ROLLEI-CAMERA-FACTORY-Switzerland-Italy-/261585313593?pt=US_Film&hash=item3ce7b31f39&nma=true&si=7NWuW8CubtYjyLOCWNzY91RJBTc%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557