Vintage Colt Firearms Porcelain Sign. Add a vintage touch to your gun shop, ammo store or gas pump with this porcelain sign featuring Donald Duck advertising Colt Firearms Duck Revolvers. The high-quality porcelain ensures that it will last for years to come. This sign will enhance your man-cave, collection, shop, or garage. Vintage Colt Firearms porcelain sign. Walt Disney Donald Duck. 12 inches in diameter. Vibrant colors and excellent porcelain.