Early piece marked S.& S. Co which was made by Hemingray.

Hemingray reworked from S & S Co. mold

Brookfield version marked with a B

Early Brookfield style

Gayner Glass Works

California Glass Insulator Co.

Whitall Tatum Co.

Ohio Valley Glass Co.

Maydwell (Crystallite Products Corp.)

Star - A number of glass companies made insulators for GE with the star logo.  Brookfield and Novelty were two that may have made this insulator.

King City Glass Works

Hemingray Style