This is a good looking insulator. It is embossed No 20 on one side of the skirt and there is a very faint blot out on the reverse side. There is a mold line over the base. Very nice tealish color, probably a deep aqua. There is a small flake on the side of one ear and a fairly small chip on the inner skirt. In the skirt (back side) there is a 1/2" long pollywog near the surface of the glass.