Montblanc Meisterstück 134 Long Window Fountain Pen
Vintage Montblanc Pens - Montblanc 134 and 136, both made in the 1930/40s. Both feature the telescopic piston mechanism, which allows to load some more ink than usual. The 134 has a "
Bonhams : MONTBLANC: Meisterstück No. 134 Piston-Filler Fountain Pen, White and Black Celluloid, Rare Prototype, 1942-1944