An exceptional and highly collectible S.T. Dupont "Streamline R Brushed Palladium" fountain pen set (Model Ref. 251574). This exclusive collection is now discontinued and extremely rare to find in such immaculate, unblemished condition. The Streamline R collection is heavily inspired by the 1930s American aerodynamic Industrial Streamline movement, featuring fluid, curving lines that provide perfect ergonomics. Technical Specifications:Material: Crafted from S.T. Dupont's innovative, patented Céramium A.C.T. (Advanced Ceramium Technology) — an ultra-lightweight and highly scratch-resistant alloy (40% lighter than standard metal). Finish: Exquisite brushed palladium with polished, mirror-finish accent rings and an articulated spring clip. Nib: Premium 14k (585) solid gold nib, rhodium-plated to perfectly match the palladium body. The nib is medium-sized (M) and explicitly hallmarked with the historical S.T. Dupont "D" cursive logo and gold purity stamps. Filling System: Cartridge or converter (both options included in this lot). Lot Completeness & Accessories (Full Set): This lot is offered in its absolute complete factory configuration, containing rare components that are virtually impossible to find together: White Outer Box: Features the original factory label with matching barcode, MPN 251574, and product description. Black Inner Presentation Case: Pristine black textured box with the silver-stamped S.T. Dupont Paris logo. The Iconic Car Desk Stand: A stunning vintage-car-shaped desk display crafted in high-gloss black lacquer with detailed chrome-spoked wheels. Original Ink Converter: The authentic S.T. Dupont piston converter, allowing the use of bottled ink, preserved in its original clear pouch.Original Factory Refill: An original ink cartridge/refill, still safely sealed inside its authentic white protective paper wrap from the factory. Documentation: Includes the official Stylos Pens booklet/manual and the plasticized International Guarantee Card tucked into the bottom compartment. Condition Report: Pristine New Old Stock (NOS) / Vault Condition. The fountain pen is entirely unused, has never been inked, and shows no micro-scratches or handling marks. A key detail of immense value for discerning collectors: The car desk stand still retains its original clear factory protective plastic film completely intact over the lacquer and wheels, having never been removed or displayed. All booklets and paper components are crisp and uncreased.