This is a square salad plate with a gadroon border and gold trim, made by Harker, and decorated as a souvenir for the state of Florida. It is marked Colonialware on the back, but I have identified it as Harker based on the shape, border, and decoration. I think Colonialware was the decorating firm. The plate is 8" wide. The Florida decoration in the center includes the Bok Singing Tower, the University of Miami, the Stephen Foster Memorial Museum in White Springs, The Castillo de San Marcos in St Augustine, Hialeah Park, Marineland, Miami Beach, Key West, Overseas Highway to Key West, Ringling Museum of Art in Sarasota, Muncipal Pier in St. Petersburg, Silver Springs, the state Capitol in Tallahassee, and a random orange grove. It does not include Disney World, so it is from before Disney opened in 1971. It is probably from the 1950s. The plate is in excellent condition with no chips or cracks.