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.
Standard Shipping (Non-US Orders):
- USD 8.99 flat rate (or equivalent)
- Free for orders over USD 99 (or equivalent)
- Ships via registered airmail (postal service)
- Includes tracking
Standard Shipping (US Orders):
- USD 14.99 flat rate
- Free for orders over USD 150
- Ships via registered airmail (postal service)
- Includes tracking
Expedited Shipping:
- USA: USD 39.99 flat rate
- Rest of the world: USD 29.99 flat rate (or equivalent)
- Ships via trusted couriers such as FedEx, DHL, or UPS
- Includes tracking
Note: Shipping rates to the United States are higher due to tariffs. We continue to absorb part of these costs to keep rates as fair as possible.
For more information about our shipping policy, please click here.
