Vintage Sinclair Gasoline Porcelain Sign. This vintage Sinclair Gasoline sign is a must-have for any gas and oil advertising collector. With its bold green Sinclair colors and iconic Dino logo, it’s sure to a make display to your collection. This pump plate sign features the Sinclair Gasoline brand name with Dino the dinosaur. Perfect for adding a touch of nostalgia to your gasoline collection, retro man cave, garage, gas pump or shop. I’m not Old – I’m Classic. 12 inches in diameter. Vibrant colors and excellent porcelain.