Vintage Duckhams Racing Motor Oil Enamel Advertising Sign Mancave Raised Letters. Duckhams enamel sign, in good used condition with age & usage related marks. The lettering & flags are raised. Measures 15 inches wide, & 10 inches high. Please study the pictures for a more accurate description. Check out my other interesting items & tools by clicking on the see other items at the top of the page.