CD-133 H.G. Co / Patent May 2 1883 - Front & Standard - Back in Yellow-Green with sharp DP's. It's not an expensive insulator in the scheme of things, but sure looks spectacular in my collection. This is a picture of the back.

I also will post a picture of this insulator contrasted with the CD 145 H.G. Co. /Petticoat that I found on the Central of Georgia North - South railway telegraph line near Albany, GA.