Retro 51 can be credited with boosting the national interest in pens in the early 2000s. Its colorful Tornado line of pens has been a top seller for more than a decade. This ivory-and-chrome Retro 51 Tornado fountain pen looks to be in great shape. It fills with only standard international cartridges. Minimal wear and smooth steel nib that writes a fine line. Click the headline for a great nib photo. 12.9cm capped.