Vintage John Deere Porcelain Sign. This vintage John Deere porcelain sign is a great addition to any gas and oil or advertising memorabilia collection. Measuring at 17 3/4″ x 8 1/4″, this sign features the iconic John Deere brand and farming equipment. The black, red, and yellow color scheme adds a pop of color and has excellent porcelain & gloss. This will look great in anyone’s man cave, collection, shop, bar, barn or garage. Vintage John Deere porcelain sign. Large John Deere lettering. 17 3/4″ by 8 1/4″. Vibrant colors and excellent porcelain.