Vintage porcelain enamel advertising sign. May & Baker’s Quinine Tablets. A classic British pharmaceutical product widely marketed in the early 20th century. The bold yellow and white enamel design with deep black and blue lettering reads. Ask for May & Baker’s Quinine Tablets – The Very Best. Cooper Bond Ltd London S. This vibrant enamel board reflects the strong visual appeal and craftsmanship of early English advertising. Ideal for collectors of vintage medical memorabilia, chemist signs, or British enamel advertising. Porcelain enamel advertising sign. Cooper Bond Ltd, London S. 18 x 12 inches approx. Early-mid 20th century c. Porcelain enamel on metal sheet. Yellow, white, black, and blue. Vintage pharmaceutical advertising sign. Medical / chemist / apothecary collectibles.