This insulator is a CD 304 top and a CD 310 base that is nicknamed a Coolie Hat. It has faint pressed in embossing; "Hemingray Patent May 2 1893". The insulator is a blue aqua color. It is in very near mint condition with the top having 4 drips with flakes off them. It displays very nice. Priced at $235.00 plus USPS ground select shipping cost. (around $30.00) Thanks.