Piston filler with a 24 carat gold plating and a high-quality resin casing and a viewing window to monitor the ink level. The nibs of the Souverän piston fillers M1000 and M800 are made of 18 carat/750 gold, the nibs of the models M600 and M400 are made of 14 carat/585 gold. All nibs are refined with a rhodium decor and their writing qualities were tested by hand. The fountain pens are equipped with a differential piston-filling mechanism, of which is elaborated with high-value brazen components on the models M1000 and M800.
The above illustration shows the relationship of the sizes to each other. Please refer to the table below for the actual sizes.
The above illustration shows the relationship of the sizes to each other. Please refer to the table below for the actual sizes.