The two Star signals shown on the left both have the Elmer ring at the top of the pinhole, but they sure are different! The middle one more resembles the Brookfield, howerver is still different as the wire ridge is a bit more rounded on the BF. I just think it is strange that Novelty used such different mold shapes for the same insulator. Another thing to note is that the Star emblem is upside down on the far left one with the squared off wire groove. I found a bunch of these that were used in the Calumet area of Michigan's Upper Penninsula.