The vintage double-sided Detroit Diesel Black Porcelain Sign is a rare and sought-after collectible item advertising the iconic brand from the 1950s. This original sign features a multi-color design and measures 30″ x 20″, showcasing the classic gas and oil theme popular in Americana. Made in the United States, this porcelain gas sign is a unique piece of merchandise and memorabilia that would make a valuable addition to any collection.