Here are two different CD 162 's. Both fit the index  description! The one of the left has a '1' on the dome. The one on the right has a '5' on the dome.
The style on the right is hard enough to come by. I have only seen two of them. I know Gill Pollard has seen some in his area. The rightmost style all seem to have a number 5 on the crown. Notice the crown is shorter and wider; and the wire groove is very different in shape and size.
I know the piece on the right is not a CD 162.1 - you can [id=58738830] to see a picture of the leftmost insulator compared to a CD 162.1 of similar color.
The rightmost is also not a CD 162.3 as you can [id=58739302] to see a picture of the leftmost one compared to a CD 162.3!