Crafted in oxidized brass and aluminum and sporting a silhouette inspired by early 20th century Zeppelin airships, the Diplomat Aero Oxyd Brass Pen is a study in vintage style. The Diplomat Aero’s groove-like depressions on the barrel and cap add a modern spirit to its classic and ergonomically pleasing form. All Diplomat pens are designed and manufactured in Kierspe, Germany. Rollerball or Ballpoint.