TWSBI Diamond 580AL Fountain Pen in Iceberg Blue Color__Silver__rotring-600-series-silver-ballpoint-pen Smithsonian logo on top ring

Smithsonian logo on top ring

and unmistakable character

you can simply swap the nib by unscrewing the nib unit from the section and screwing in this replacement nib

so you can select the color that fits your style

These inks are engineered to compliment LAMY fountain pens

TWSBI Diamond 580AL Fountain Pen in Iceberg Blue Color__Silver__rotring-600-series-silver-ballpoint-pen Smithsonian logo on top ringThe TWSBI (commonly pronounced "twiz bee") Diamond 580 is the 21st Century interpretation of a classic writing instrument. While most of our modern communication devices lack transparency and customization, the TWSBI Diamond 580 excels with a transparent resin construction that can be disassembled using the included wrench. The Diamond 580 represents the fusion of a traditional fountain pen with a modern industrial design. The result is an eye