About This Pen: This Montblanc Meisterstuck Solitaire Doue Stainless Steel M23364 Pen has a ballpoint writing system with twist mechanism. It features a black precious resin barrel, complemented by a high-grade stainless steel cap. Both clip and fittings are platinum-plated. The three high-grade stainless steel rings on the cap is embossed with the Montblanc brand name.