The Perkeo is an entry-level full-sized pen from Kaweco. The faceted body, grip, and cap are made of a shimmering variety of colors. Depending on the viewer's angle and the incident light, the translucent writing instrument shines in a unique color scheme, changing from green-bluish to pink. This mimics the optical effect of mother-of-pearl, which gives the series its name. The triangular grip helps keep your fingers in the proper grip position. It comes complete with a silver stainless steel nib. 
 
It accepts standard international ink cartridges, or you can also purchase a standard international converter separately. An optional clip is also available separately.

Note: This pen comes with a standard international short cartridge inside the body and a cartridge spacer already installed.