In 1900 the Zeppelin airship began its first test flight under the aeronautical leadership of Earl von Zeppelin. Based on this event and the design of the airship Diplomat introduces the Aero pen to the market. The Diplomat Aero is characterized by groove-like depressions on the barrel and cap which lends the pen next to its classic form a modern spirit. The Diplomat Aero is made of anodized aluminum and is especially designed ergonomically. The clip harmonises well with the shape of the Diplomat Aero. The Diplomat Aero fountain pen has a steel (optional 14ct gold) nib in Fine, Medium and Broad. The pen use a ink cartridge or a converter. Since 1922, the name Diplomat has stood for sophisticated writing instruments. Driven by excellence in quality and a spirit of innovation the manufacture for turned fountain pens developed into a leading manufacturer of premium writing instruments. The Diplomat pens still manufactured in Kierspe, Germany.