TWSBI Diamond 580ALR Prussian Blue Fountain Pen - Clear body with Blue trimA calm, confident Prussian blue The TWSBI Diamond 580 Prussian Blue Fountain Pen is built on TWSBI's proven 580ALR model, with deep Prussian blue trim to make it feel less like a resin demonstrator and more like a dependable tool. It's not trying to be showy, but conveys confidence. It uses the reliable TWSBI 580 piston and a smooth writing nib, widely regarded as one of the strongest everyday performers for consistent writing. What sets it apart Deep