Vintage brown ceramic insulator. Measures approx 4.5 inches tall and 5.5 inches wide. Attractive old item with some scratches.
Information received from anotherer - "
There are 4 letters in this monogram. The largest letter is O. The B is within the O. As in any monogram, the largest letter is the start of the name. The first letter is for Ohio. The next largest letter is for Brass. The last two letters are for Silent Type. Ohio Brass made this insulator and it is treated on the top and in the pinhole to lessen static noise in your radio. The treatment is called radio treatment. This insulator is for electric power". Thanks so much for the research information!
Buyer to pay shipping. I will package carefully in a box and ship promptly.