This is a very nice and rather uncommon Paul Wirt red mottled hard rubber flat top fountain pen, working with a sac and equipped with a full flex No. 2 Wirt 14k nib but which unfortunately appears a bit bent, as depicted in photos, and would likely benefit from some work. Pen is otherwise very clean. Barrel imprint visible. Lever filler which is also uncommon for Wirts I have seen. A lovely pen needing a bit of work.