Insulators as follows -- actual postage additional:

U-1925 (skirt incuse) BI & HC {British Insulated & Helsby Cables} -- this is made to the Sinclair Adkins Patent where the inner shed unscrews to allow a wire to loop between the inner shed and the outer insulator -- there are two small skirt bruises with only one causing a small chip. the inner has a very short stress crack. A very cool design! -- $30 plus actual postage

U-1941 (skirt incuse) GPO and the Wade Pottery logo -- this is a pothead style where the top unscrews to allow wire access through the skirt -- just a few flakes on the porcelain threading -- $15 plus actual postage (SOLD)