Embossed on the (Dome) A 6 or 9 upside down or backwards {which is not unusual for this style of insulator} and on the (F-Skirt) DUQUESNE. (R-Skirt) GLASS. CO. The color is a very desirable CORNFLOWER BLUE Typical crude glass with one under pour on the base. It will be a standout in your collection for…. $140.00… plus postage, Insurance is optional/extra). Buy with confidence! We do not sell altered insulators. Don't wait for a sale it's not going to happen.