Description This gorgeous S.T. Dupont fountain pen in Diamond Guilloche Aquamarine with Palladium trim, is part of the Line D Large Diamond Guilloche collection, created for the US market exclusively. The palladium-plated fittings and 14k white gold nib accent the gorgeous aquamarine cap and barrel. S.T. Dupont pens are known for the iconic ‘click’ sound that is made when closing the cap onto the barrel. The S.T. Dupont Line D pens are hand-crafted in France, and were recently updated to include the Dupont blazon signature embellished on the articulated clip, and the Signature D initial in cursive as a cap jewel. The fountain pen fills with the included converter for use with bottled ink, or with standard international cartridges. The highly anticipated S.T. Dupont 'Diamond Guilloche' collection for 2020 is a luxurious series of fine writing instruments created exclusively for the US market. This new collection combines old world Dupont glamour with an updated modern design. S.T. Dupont brings together one of their oldest and most treasured crafting techniques 'guilloche under lacquer' to the newly updated large size 'Line D'. Available in 3 vibrant colors: Ruby, Sapphire and Aquamarine, the pens combine the skills of the S.T. Dupont master goldsmith with the expertise of their master lacquerer.Guilloche is an intricate decorative technique created by engraving a surface with great precision and then adding a transparent layer of resin, enamel, or in the case of S.T. Dupont’s fine writing instruments, a natural lacquer over the engraved surface. The solid brass body and cap is lacquered multiple times and hand polished to create a smooth, unique texture on the surface that differs from each pen as no two writing instruments are identical.The 'Diamond Guilloche' collection features the namesake technique that is French for "engine turning." The diamond design is created by an engine turning process that engraves very precise, intricate, geometric patterns into an underlying material. For this latest launch, S.T. Dupont selected a finely detailed diamond pattern which is then overlaid with sumptuously colored Urushi lacquer, the result is simply spectacular.S.T. Dupont's artisans add layers of natural lacquer to the surface of the diamond patterned guilloche in a months long process involving many applications and polishing to impart depth and mystery to each finish. The engraving causes the reflection of light through the overlay of natural Urushi lacquer creating a stunning display of light and color.The collection is launched on the newly updated Line D Large pen; recently remodeled with a new bold blazon on the articulated clip, an enhanced Dupont 'D' in the crown of the cap and a perfectly balanced shape for exceptional writing. The pen cap closes with Dupont's iconic 'click' and features a fluted grip section for a superb writing experience.