TWSBI Diamond Mini Classic Fountain Pen
Key Attributes
| Brand | TWSBI |
| Model | Diamond Mini Classic |
| Era | post-1980 |
| Filling System | piston-filler |
| Nib Material | steel |
| Nib Size | Extra Fine |
| Body Material | plastic |
| Colorway | clear demonstrator with silver trim |
| Condition Grade | mint |
| Rarity | common |
About this Fountain pen
A modern TWSBI Diamond Mini Classic fountain pen with a compact faceted transparent body and visible internal piston mechanism. Collector interest centers on its demonstrator-style construction, diamond-cut barrel facets, and silver-tone trim.
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