Antique Utility Pole Glass Insulator Tops

Description

The antique glass insulators are made from very heavy green glass with threads on the inside to screw onto the utility pole.  The outer glass is in excellent condition, with no cracks, but some molten glass flow lines.  One has a small piece missing from the underside not affecting the threads.  The center one has a very distinct "B" marking on it, the other one the "B" marking is less distinct, but readable.
The auction price is for ONE.  Winner can take one or two for the same unit price.
The shipping cost is the same for whatever is won, one or two.  (Only two left)