TWSBI Diamond 580ALR Fountain Pen - Affogato with Onyx

The TWSBI Diamond 580ALR features a sleek brown aluminum grip section, cap ring, and piston knob, all enhanced with a subtle matte finish and accented by circular engravings on the grip and cap. Complemented by onyx black trim and a black steel nib, this pen is beautifully presented in a modern clear display case.

Equipped with TWSBI’s signature piston-filling mechanism, the Diamond 580ALR lets you easily fill from bottled ink, while its transparent demonstrator barrel showcases both your ink color and remaining ink level. Designed with a nod to the elegance of traditional fountain pens, it combines timeless mechanics with a modern industrial aesthetic—bringing classic writing instruments back into the spotlight for today’s writers.

In line with TWSBI’s philosophy of transparency and craftsmanship, the 580ALR is fully detachable, allowing users to explore and understand the inner workings of their pen. Each pen includes a wrench and silicone grease for long-term care (though they’re not needed immediately). If you choose to disassemble the nib and feed, handle with care, as the feed is delicate.

You may notice a white substance on the piston—this is bearing grease, essential for smooth function, and should not be removed or replaced with silicone grease during cleaning.