S. T. DUPONT GUILLOCHE CAP PEN COLLECTION. S.T. Dupont Olympio Black and Gold Pen. Sophisticated reflections of light on shadow transform the masculine profile of the Orpheo Diamondhead into a truly decadent writing instrument. The palladium-plated diamond head-textured cap is contrasted with classic black Chinese lacquer for beauty that's also supremely comfortable in the hand. Select from roller ball, ballpoint or fountain pen with a palladium-finished 18k gold nib.