Thought I might share photos of my porcelain battery lid collection. For some reason the lids are easier to find than the whole complete unit with the jar, but all are scarce and pricey. I love the embossings on these and the different styles. There were numerous patents by different companies for electric storage batteries it will make your head spin. I have these mounted on my back porch wall so the detail is not the greatest. Top to bottom and left to right: Marked L.S. Miller Cinncinatti O., Edison Primary Battery Type V, Edison Primary Battery Hump Back type. Lower row: Warner Electric Co. Muncie IND. Hump back type, R.S.A. (Railroad Signal Association) National Carbon Co. Cleveland O. round, A.A.R. (American Association of Railroads) National Carbon Co. New York Square, A.A.R. National Carbon Co. NY. open type with an oil hole.