同じ物ではありませんか。
NO.96に貼り付けたリンク先の説明文にもNoblesse Seriesの「MONT BLANC Slim-line 2118」って書かれてますね。
↓
MONT BLANC Slim-line 2118 Fountain Pen, a member of the 2nd Generation of Noblesse Series, produced in the 80's. It has a matte black finish and gold plated trims. It is decorated at the tip of the clip with a Montblanc logo insert. Gold plated medium nib. Cartridge sucks up ink with screwing motion. One owner since new but no longer used. Comes with recently obtained Mont Blanc London confirmation of model no. Not brand new looking, slight indication of wear on grip. Stylish and slightly retro.