Antique Signature Golf Balls. Old and Rare U.S. Rubber Company Golf Balls. A great opportunity to add 4 balls from the U.S. Rubber Company History to your collection! The items include: 1 - Electronic U.S. Royal; 1 - Special U.S. Royal Dimple; 1 - Electronic U.S. True Blue; 1 - U.S. True Blue Dimple Protective cubes included. Ships to lower 48 only …. Thanks for looking!