VERY POPULAR UNDER MANY NAMES. If you Google this type of pen, you will not just fine the ones listed here as GATSBY. Each of the major manufacturers has their own name for what is basically the same pen. The differences between all these pens are slight. Some have different designs on the fittings, perhaps a slightly different clip, etc. Gatsby is a well known product froom PennState, a major player in the woodworking and pen fields. Gatsby is a twist pen, though Gatsby does make a clicker model of the same pen. People love these because of their simple elegance. It is, as the picture shows, a one-barrel pen (with no cover on the nib.) The nib is exposed by twisting the body of the pen.