Collectibles--General (Modern)/glass insulator


QUESTION: Are you aware of a company that ever used a raised embossing of a B and a picture of a bull?

ANSWER: Not sure -- is this on a glass insulator?  Can you send a picture of the insulator -- I should be able to identify from there.

         Thanks, --Bob

---------- FOLLOW-UP ----------

picture 1
picture 1  

picture 2
picture 2  
QUESTION: Here are some pictures

The marking on your insulator is just a raised "B" -- I suspect the bull is a defect in the glass and not an intended marking.  The B on this insulator is for the Brookfield Glass Company that was based out of Old Bridge, NJ and made insulators from the 1860's through 1922.  This style is nicknamed an exchange as it has two wire grooves and is intended for telephone use -- I'd date it from the turn of the last century to the teens.  These are relatively common with a $3 value or so.  

         Hope this helps -- Thanks, --Bob

Collectibles--General (Modern)

All Answers

Answers by Expert:

Ask Experts


Bob Berry


Questions related to collecting Glass Insulators and porcelain insulators - I can provide historical information as well as current collector values. I am also interested in purchasing insulators I need for my collection.


I have collected since the early 1970's and have much historical information, as well as knowledge of current insulator values.

National Insulator Association (

BS & MS in Electrical Engineering

©2017 All rights reserved.