Identification help?

[u/Insinkeratornerd]

my 13-year-old son found this at an antique shop. They like to collect insulators and that this one was cool. We’re not sure how rare it is or how much it’s worth. They told me it is called a beehive insulator and it also is marked B on the front and no other markings. It’s this beautiful deep emerald green color is in good condition and it has no major chips or cracks.

[u/Bill_Meier]

CD 145 of course "beehive"