hemingray blue glass insulator patented may 2 1893 lots of air bubbles

Description

nice vintage hemingray blue glass insulator patented may 2 1893 as seen in the pics. the old glass has lots air bubbles and swirls with a raised seam going about 3/4 up on the side. I see one of the drip points has the point missing and this is all I see wrong with this insulator