Nakaya Dorsal Fin Version 1 Aka-tamenuriThe smooth tamenuri finish highlights the sleek minimalism of this pen form and function are united in an exemplary manner. Nakaya's Dorsal Fin pens have proven to be extremely popular with pen lovers the fin shape on the cap is both aesthetically striking and also serves as a built in roll stopper. This pen is made by applying multiple layers of urushi lacquer to the height of the fin. Mark Twain, referring to a similar feature on the 1920's Conklin