Listed is a CD 252 Tall Variant (4 1/2") embossed THE M&E Co. PHILADELPHIA and on rear skirt KNOWLES CABLE INSULATOR. Neat streak of amber on front. - SB - Blue aqua - Insulator has a sliver on left side about 1" and a sliver on front extends about 1/4" from base. Tough insulator to find now days. $225 plus shipping.