Keywords: General Motors service, enamel advert sign at the den hartog ford museum.JPG Den Hartogh Ford Museum General Motors service enamel advert sign own 2013-02-17 15 20 52 Alf van Beem CC-zero Trademark Classic vehicle photographs by Alf van Beem Enamel automobile advertising signs in the Den Hartogh Ford Museum Nostalgia by Alf van Beem |