Here is a comparison shot of the two CD 166 mold types. On the left is CD 166, the square dome mold embossed on the front "A011/CALIFORNIA". This mold comes in a wide variety of typical California colors. This particular one is the typical sage green color. The one on the right is the CD 166 "round dome/ straight sides" mold. It has no style number embossing, just the word "CALIFORNIA". This mold type comes in a much more limited range of colors: blue, green, green aqua and aqua.