A nice seed bubble filled, light blue CD 215 skirt embossed N.E.G.M.CO. and PAT JUNE 17 1890 on the reverse. There are two small shallow base chips and a sliver chip on the back side of one ear. I'll post a second photo of the patent date side showing the sliver chip to the ear. I'm asking just $20.00 plus actual shipping cost for this fine looking insulator. PayPal, friend mode, or check