The TWSBI Diamond Mini Piston Filler Fountain Pen – Classic proves that great things come in small packages. Designed as the perfect travel companion, this pen offers all the performance and ink capacity of the famous Diamond 580 but in a compact, pocket-friendly size.
Unlike its larger sibling, the Diamond Mini features a unique threaded posting mechanism. The cap screws securely onto the back of the barrel, instantly transforming this compact pen into a full-sized, perfectly balanced writing instrument. The Classic edition features a professional black cap and piston knob paired with a transparent diamond-faceted barrel, allowing you to monitor your ink level with style.
Despite its small stature, it boasts a powerful piston filling mechanism that holds approximately 1.2ml of ink—vastly more than standard cartridges. This engineering marvel eliminates the need for messy converters—simply dip, twist, and fill directly from your favorite bottle of ink.
True to TWSBI’s philosophy of user empowerment, the pen arrives in a presentation box that includes a wrench and silicone grease, allowing you to fully disassemble and lubricate the mechanism yourself—ensuring your pen lasts a lifetime.
In Stock & Ready
Every tool is personally dispatched from our hubs within 48 hours (2 business days).
Standard Tracking (Registered Airmail)
Expedited Priority (FedEx/DHL)
Our Logistics Commitment
All orders are handled at our precision fulfillment centers in Hong Kong or Taiwan. For our US community, we absorb a significant portion of import tariffs to ensure your rates remain fair and transparent.
Note: Rates are listed in USD; our system automatically converts these to your local currency at checkout.
