Kaweco

Kaweco is a German maker of fountain, ballpoint, and rollerball pens. Their fountain pens take a standard international cartridge or piston converter. They have a mini converter for some of their smaller pens. Their ballpoint pens take their branded Parker style G2 refill, which also comes in a rollerball variant. Their multifunction pens take their branded D1 ballpoint refill. Their rollerball pens take their branded standard ceramic rollerball refill.

Manufacturer’s Website: Kaweco Pens