Diplomat Aero Fountain Pen, Violet, Fine Nib. Diplomat Aero Fountain Pen, Violet Smooth grooves and streamlined body are reminiscent of a 1920s Zeppelin Diplomat Aero fountain pen in anodized aluminum with grooves on the barrel and cap. All metal casing with anodized surfaces. The nib has a finely chiseled design and is made by JoWo of Germany. Utilizes standard international-size ink cartridges or a converter for bottled ink (both included). Length Capped: 5.5″ (139 mm); Length Uncapped: 5.1″ (129 mm); Length Posted: 6.2″ (158 mm); Barrel Diameter (Maximum): 0.59″ (15 mm); Grip Diameter: 0.43 (11 mm); Weight: 1.5 oz. Diplomat Aero Fountain Pen, Violet. Smooth grooves and streamlined body are reminiscent of a 1920s Zeppelin. Diplomat Aero fountain pen in anodized aluminum with grooves on the barrel and cap. Groove-like depressions on cap and barrel. Distinctive Diplomat logo stamped on the cap end. Utilizes standard international ink cartridges or converter for bottled ink. Sorry, our items are NOT available for pick-up. No additional information at this time. You might also like. Diplomat Aero Fountain Pen, Citrus, Fine Nib. Diplomat Aero Fountain Pen, Green, Medium Nib. Diplomat Aero Fountain Pen, Orange, Medium Nib. Diplomat Aero Fountain Pen, Turquoise, Medium Nib.