TWSBI ECO Black Fountain Pen
Key Attributes
| Brand | TWSBI |
| Model | ECO |
| Era | post-1980 |
| Filling System | piston-filler |
| Nib Material | steel |
| Nib Size | Extra Fine |
| Body Material | plastic |
| Colorway | Black/Clear |
| Condition Grade | mint |
| Rarity | common |
About this Fountain pen
Modern TWSBI ECO fountain pen in the Black/Clear colorway with a transparent barrel and black cap and piston knob. Collector-visible features include a piston-filling demonstrator body, silver-tone trim, and a faceted cap design.
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