The pens in this series were made in a variety of translucent ringed celluloid with beautiful colors, but there are also versions with black spirals and a variety of other colors with marbled or lozenges patterns. There is no known specific list of colors. | The pens in this series were made in a variety of translucent ringed celluloid with beautiful colors, but there are also versions with black spirals and a variety of other colors with marbled or lozenges patterns. There is no known specific list of colors. |