Montblanc Writing Instrument Meisterstuck Geometry Solitaire LeGrand Rollerball 118098. The Meisterstuck Solitaire Geometric Dimension was born of the desire to unite Montblancs classic design with unique materials. This writing instrument, engraved with a three dimensional geometric pattern with optical effect in a sophisticated platinum tone, features a platinum coated clip and three platinum coated rings embossed with the Montblanc brand name. Finished with the Montblanc emblem, it appeals to ones individuality.