Specifically designed for a hand-operated oil luster, this small double-sided porcelain sign let the service station operator know which type of oil was inside. From the 1920s to the 1930s, Standard Oil Company—Indiana issued this Iso Vis motor oil. Side A is in excellent condition, with excellent gloss throughout and a few small chips around the outer edge. Side B also features excellent gloss, with a 3/4 inch chip along the lower left edge. Not many Iso-Vis lubster signs are seen these days, so buy this one while you can! 21200-WQWP