This insulator is a CD 304 top and a CD 310 base that is nicknamed a Coolie Hat. The top is embossed on the front with faint pressed in embossing; "HEMINGRAY PATENT MAY 2 1893". It is a beautiful blue aqua color that is strong on the blue side. The insulator measures 9" wide by about 12" tall. The top is good condition but has a thumbnail size chip on the RH side, a 3/8" chip next to that, and about 20 flaked drip points. The CD 310 base is in very near mint condition. This is a nice displaying Coolie Hat insulator from an old transmission line in Western Montana that will not set you back like a VNM + to mint one would. .1ST $95 +$40 FOR SHIPPING U.S.A.ONLY