TWSBI ECO Fountain Pen / Cosmo + Onyx
TWSBI · sold by The Gentleman Stationer · $58.99 · out of stock
The TWSBI ECO fountain pen is a true workhorse that’s made for everyone, from the beginner who just wants to try out fountain pens, all the way to seasoned fountain pen experts. Taking different design cues from the TWSBI Diamond 580, the ECO features a postable cap for maximum versatility. The pen also has an inner cap to ensure a perfect seal and prevent the nib from drying out when not in use. The new “Cosmo + Onyx” ECO is part of TWSBI’s Mixed-Color series, where different resins are mixed into the injection molding process to create truly unique color combinations. No two pens will look…
| Option | Price | Stock | |
|---|---|---|---|
| Extra Fine | $58.99 | out of stock | |
| Fine | $58.99 | out of stock | |
| Medium | $58.99 | out of stock | |
| Broad | $58.99 | out of stock | |
| 1.1mm Stub | $58.99 | out of stock |
Prices and stock from shop.gentlemanstationer.com’s public catalog, last checked 2026-11-01 08:05 UTC; the store’s checkout shows the final price. Agents: JSON at https://api.kaupia.com/v1/product?id=kp:e1cf6a08-c853-48a6-adcb-ab3e5ac9d1dd; buy with POST /v1/checkout or MCP create_checkout.