Now here is a good looking insulator. This is style [004]. There is an embossed A on the top of the dome. On the skirt is embossed PATENT over DEC. 19 1871 and on the reverse side of the skirt PATENT over MAY 2 1893.( Bar in the A is missing). It has sharp drip points (one chipped). The color is a fizzy blue aqua with a pronounced bubble in the skirt. This really could be the sleeper of the night. $75 delivered to you door.