Four insulators as follows -- note these are much smaller than the typical versions -- Take all four for $20 plus actual postage!

U-1521 (Crown) GPO over the Taylor & Tunnicliff logo -- VNM

U-1521 (top) Bullers logo / MADE IN ENGLAND -- VNM

U-1521 (Crown) G.P.O. (Skirt) Bullers logo -- some minor scratches & pin cut off at base

U-1524 (skirt) Taylor & Tunnicliff logo (top) B -- VNM