A recent auction score, the insulator is a Diamond CD 154 in gingerale but upon closer inspection the piece has areas of blue coloration in the wire ridge, dome and skirt. I have another insulator like this one with the same blue areas in the glass, but it is damaged. I never thought I would come across another, especially in this NM condition. Owners of gingerale Diamond CD 154 look at your pieces carefully you may have one of these oddities and not even know it.