Vintage Indian Motorcycles Porcelain Sign. This vintage Indian Motorcycles porcelain gas pump sign is a must-have for any collector of gas and oil memorabilia. Measuring 16″ x 5 1/2″ in size and featuring a maroon color with the iconic Indian Chief, this sign is the perfect addition to any garage or man cave. With its unique design and featured refinements such as gas porcelain, this sign is sure to catch the eye of any motorcycle enthusiast. Vintage Indian Motorcycles porcelain sign. Native American Indian Chief Shape. Vibrant colors and excellent porcelain.