This vintage 1957 United States Penitentiary Alcatraz porcelain prison sign is a unique piece of merchandise and memorabilia that would make a great addition to any collection. Measuring 15″ x 12″, this original sign features multi-color design and was manufactured in the United States during the 1950s. The sign’s brand is PRISON and its type of advertising is a sign. The color of the sign is multi-color, and it is an original piece. The sign is perfect for collectors of 1930-69 items, and it is a great conversation starter.