TWSBI Diamond 580ALR Fountain Pen in Prussian Blue Special Edition - Goldspot Pens
TWSBI SWIPE Fountain Pen - Prussian Blue - The Goulet Pen Company
TWSBI Diamond 580 ALR Prussian Blue Fountain Pen — The Gentleman Stationer
TWSBI Diamond 580ALR Prussian Blue – Yoseka Stationery
TWSBI SWIPE Prussian Blue Fountain Pen – Yoseka Stationery
NPD: TWSBI Diamond 580 in Prussian Blue. Broad nib because that's all they had, but M and F nibs are on the way. Writing level: skunk, but getting better. It has been