Vintage Enamel Porcelain Sign Nugget Boot Polish Tiger Brand Imperial Enamel C4. This product data sheet is originally written in English. Images Are It’S Own Description. Sign Enamel Glaze Is In Very Good, But Sign’S All Border Slight Damage Due To Rust, Which You Can See In The Images. Size Is 48 X 24 Inches. Made By Imperial Enamel Co. Some Enamel Damaged Rusty Spots And Rusty Edges, Which You Can See In The Images.