The Pelikan M1000 fountain pen is the largest pen in Pelikan’s Souveran range - essentially it is the Pelikan the flagship pen which features a flexible (see below) 18 carat gold nib with rhodium decoration giving a two-tone finish. 

The M1000 nibs are slightly more flexible than the nibs from the rest of the Söuveran range so they will write a little broader than you may expect depending on how much pressure is used to write. 

The M1000 has a partial brass internal mechanism, giving it a substantial weight. The metal trim of the pen is 24 carat gold plated.

The striped barrel body of the M1000 is made from celluloid acetate which is a cotton derivative and so each one is slightly different to each other, much like wood has different knots and patterns.