Retro 51 Smithsonian Collection Rollerball Pen - Dino FossilDinosaur Bones for the Pen Collector The newest design in the Smithsonian collection by Retro 51 is the Dino Fossil twist top rollerball pen. Think about someone you know that loves dinosaurs and will open this officially licensed Smithsonian rollerball pen. Inside the commemorative tube they will discover a metal pen where you can actually feel the bones. Its been plated in stonewashed copper to give it an unearthed look and finally top printed in