Description This gorgeous S.T. Dupont rollerball in Diamond Guilloche Sapphire with Palladium trim, is part of the Line D Large Diamond Guilloche collection, created for the US market exclusively. The palladium-plated fittings accent the gorgeous Sapphire Blue 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.