For sale is a. Vintage Dr Bull’s porcelain sign that measures 11 3/4 inches across. This convex shape sign features the iconic Bull logo in the center, perfect for General Drug and Medicine enthusiasts and collectors alike. The sign is in excellent condition, with no visible major damage. Whether you are displaying this sign as part of your collection in your man cave, shop, bar, or garage, or giving it as a gift, you can also browse my other auctions for more vintage gas, oil, aviation, automobile, motorcycle, and hunting signs. Vintage Dr Bull’s porcelain sign. Bright colors w/ porcelain on both sides.