The Kamm Collection contains many porcelain enameled signs that were used to advertise tea brands. Enameled steel signs were produced from the late 1880’s until World War II. This example for the Salada Tea Company (USA, est. 1892) is double-sided and made of three sheets of steel. The two outer layers are formed and riveted to an inner flat layer. The outer layers are enameled with French text on one side and English text on the other.