The TWSBI Diamond 580 Piston Filler Fountain Pen – "Iris" Rainbow is a stunning collector's edition that transforms the classic workhorse into a piece of art. Unlike standard chrome models, this edition features a specialized Titanium Finish on the clip, trim, and nib, creating a mesmerizing rainbow spectrum of blues, purples, and golds.
Because of the unique titanium-oxide treatment, no two pens are exactly alike. The finish shifts in color depending on the light, making your pen truly one-of-a-kind. This model retains the beloved smooth clear grip of the original Diamond 580, offering a completely unobstructed view of the ink flowing through the feed.
Ideally suited for bottled ink enthusiasts, it features a high-capacity piston filling mechanism that holds approximately 1.9ml of ink—nearly 3x the capacity of a standard converter. The diamond-faceted barrel prevents the pen from rolling off your desk while catching the light to amplify the rainbow effects.
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.
