Shop clean out! This indicator lens is specifically designed for a 57 Chevy with a 700-R4 or 200R4 transmission. It replaces the factory Powerglide indicator in a factory instrument cluster.  I was buying parts a few years ago, and wound up with an extra. One of the photos shows what it looks like installed.  It will ship in a standard envelope with a 2 ounce stamp without tracking to save our hard earned money.  Thanks for looking!