The Pelikan M1000 is the largest pen in the Souveran line. A piston filler with 24 karat gold plating, a high-quality resin casing and a viewing window to monitor the ink level. The nibs of the Souveran M1000 piston fillers are made of 18 karat/750 gold. All nibs are refined with a rhodium decor and their writing qualities are tested by hand. The M1000 fountain pens are equipped with a differential piston-filling mechanism, elaborated with high-quality brass components.