Montblanc Meisterstück 145 Doué Geometric Dimension Fountain PenThe Meisterstuck Solitaire Doue Geometric Dimension Platinum Classique features Montblanc's classic design with black precious resin and elegant platinum tone: platinum coated cone as well as cap with three dimensional geometric pattern. The Fountain pen is finished with a handcrafted rhodium coated gold nib. The Montblanc Meisterstck Classique PT 145 Fountain pen is slimmer and slightly smaller than the Meisterstck Le Grand collection. Ident No.