About This Pen: This Montblanc Meisterstuck Le Grand Diamond M23794 (105974) Pen has a piston fountain pen writing system. It features a black precious resin barrel, complemented by a cap that is also made of black precious resin decorated with a Montblanc diamond in cap-top. Both clip and fittings are platinum-plated. The three platinum-plated rings on the cap is embossed with the Montblanc brand name. The nib is made out of 14K gold rhodium-plated inlay and is hand-crafted by Montblanc.