Four Segmented threads, all in perfect condition. Inner skirt base perfectly embossed BOSTON BOTTLE WORKS PATENT APPLIED FOR. The photographed side is almost perfect. The opposite side has extensive damage. I will post a second photo showing the damage. Basically there are two side by side haystack shaped bruises. In the bruised area there is a skirt chip roughfully 1"x1". Very desireable insulator that I think is fairly priced at $900 delivered. #148