This neat little arrester features the Line Material logo embossed on the glass part, along with the lettering LINE MATERIAL CO./ PROTECTIVE CAP on the side opposite the logo. The porcelain cap is embossed (not incused) LINE MATERIAL CO LIGHTNING ARRESTER in a circle and C650V/RATING inside the circular embossing. 3" diameter at the cap. Mint condition, $7 plus postage.