Sold Out Shell Mex Fuel Price Sign – Now Sold! An early Guaranteed Shell Mex enamel sign. Used to advertise the fuel price per gallon with holes for attaching different roundel signs when the price changed. Great colour and gloss, an excellent example. Category: Sold Items Related products John Bull Repair Outfit Read more Bates Motor Tube Patches Tin Read more Thelson Oil Pourer Read more Holdtite Repair Outfit Tin Read more