This is a 1950s reproduction porcelain enamel Coca-Cola button sign typically found in 24-inch or 36-inch diameters. [1, 2]Materials: These signs are made of porcelain enamel paint on heavy steel.Era: Most original button signs are believed to be from the 1950s or early 1960s.Value: Authentic vintage button signs in good condition have sold at auction for prices ranging from $333 up to $450.Condition Indicators: Genuine pieces often feature minor chips along the edges and light scuffs on the paint 24 in round x 2 in deep