TWSBI Diamond 580 Clear Fountain Pen
Key Attributes
| Brand | TWSBI |
| Model | Diamond 580 |
| Era | post-1980 |
| Filling System | piston-filler |
| Nib Material | steel |
| Nib Size | Extra Fine |
| Body Material | plastic |
| Colorway | Clear |
| Condition Grade | mint |
| Rarity | common |
About this Fountain pen
A modern TWSBI Diamond 580 demonstrator fountain pen in the clear colorway, shown with the faceted barrel and transparent body that make the ink chamber visible. Collector interest centers on its piston-filling mechanism, silver-tone trim, and the distinctive diamond-cut design language of the 580 series.
Gallery
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