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Veedol Enamel advert sign at the den hartog ford museum pic. Den Hartogh Ford Museum Veedol Motor Oil VeedolFrostfree Der zuverlssige hhler frostschutz own Alf van Beem CCzero Trademark Enamel automobile advertising signs in the Den Hartogh Ford Museum Classic vehicle photographs by Alf van Beem Enamel oil company advertising