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TWSBI Diamond Mini Clear Fountain Pen – Fine
£55.00
The TWSBI Diamond Mini is the line’s pocket-sized piston-filler, short enough to slip into a notebook sleeve when capped, full-size in the hand when the cap is applied to the end.
This Clear edition is the purest reading of the Mini: a fully transparent body that shows the piston mechanism end-to-end. Pair it with a coloured ink and the whole pen becomes the colour of the ink. Demonstrator body and the same robust piston mechanism as its bigger siblings.
Nib size: Fine
Only 1 left in stock
TWSBI was launched in 2009 in Taiwan by Ta Shin Precision, a manufacturer with decades of experience producing plastic and metal components for other companies before turning that expertise to fountain pens of its own. The name comes from the Chinese phrase "San Wen Tong" — the Hall of Three Cultures — with the initials reversed to form "TWS" and "BI" added for its meaning of writing instrument.
The brand is best known for its piston-filling demonstrator pens, including the Diamond 580 and the hugely popular ECO. Clear barrels show off the ink and filling mechanism, while a level of build quality usually reserved for far more expensive pens is offered at a genuinely accessible price.







