Shadow Wave - This model was a lower priced line of Skyline pens. They have smaller nibs and most lack a cap band. Some have a lifetime warranty and some do not as indicated by the lack of the double check on the clip. The sizes include standard and Demi sizes but not in the executive size. Colors are blue, brown, gray, green, and red. From my experience the blue is the most common and the red and brown the most scarce. There is a more expensive model that has a cap band and a gold filled derby. It seems to exist in most of the colors except for possibly red.