Kaweco Perkeo Fountain Pen Kaweco's new Perkeo was designed using classic Kaweco tradition. The matte finished octagonal cap and the sixteen-edged barrel harmonize perfectly. The ergonomic grip section ensures an effortless writing experience in very unique color combinations, complete with a steel nib. The Kaweco Perkeo speaks to a trend Kaweco continues to set: high quality, classic German writing instruments at an attractive price. Complete with a stainless steel nib. Cartridge/converter fill. Converter sold separately.