Diplomat Aero Fountain Pen in Citrus – 14K Gold Extra Fine Point – NEW in Box. 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. Aero is characterized by groove-like depressions on the barrel and cap which lends the pen next to its classic form a modern spirit. Aero is made of anodized aluminum and is especially designed ergonomically. The clip harmonizes well with the shape of the pen. Diplomat Aero Fountain Pen in Citrus – 14K Nib. Body Material: Violet, full aluminum casing. Trim: Matte chrome fittings. Filling System: Cartridge/ Converter. Length Closed: 5.51in (140mm). Length Open: 5in (127mm). Weight: 0.98 oz (28g). AUTHENTIC & GENUINE PRODUCTS. We are an authorized dealer for all the brands we carry. We do not sell imitations of any sort and only carry genuine, original brand name writing instruments and accessories. Please refer to your local import laws for details. We strive for your ultimate satisfaction. We cannot accept opened and used bottles of ink, ink cartridges, used notebooks, engraved pens or pen cleaning supplies. When you receive any new fountain pen, we recommend to inspect it thoroughly and if necessary, lightly dip the nib tip in washable ink to test it. Make sure all of your auctions have ended prior to checking out.