Perfectly horizontal profile of the capped TWSBI ECO Serpentine Bronze fountain pen centered on a pure white background. The clean composition emphasizes the clear demonstrator barrel, the earthy swirled olive green and grey marble resin cap and blind cap, and the rich bronze-plated pocket clip and trim ring.
Top-down view of the uncapped TWSBI ECO Serpentine Bronze fountain pen and its detached cap arranged diagonally on a pure white background. The shot details the bronze-plated nib, internal piston mechanism, and the matching earthy swirled olive green marble resin components.
Uncapped, angled view of the TWSBI ECO Serpentine Bronze fountain pen resting on a seamless white background. The photograph highlights the bronze-plated steel Jowo nib, the clear high-capacity ink barrel, and the distinct swirled olive green and grey marble resin piston knob.
Angled product photograph of the fully capped TWSBI ECO Serpentine Bronze fountain pen on a pure white background. The image clearly displays the striking contrast between the swirled olive green and grey marble resin cap and piston knob, the vintage bronze-plated trim, and the clear demonstrator barrel.
Moody, dramatic product photograph of the uncapped TWSBI ECO Serpentine Bronze fountain pen and its cap resting on a highly textured, natural wooden log against a dark background. The organic wood grain beautifully complements the pen's swirling olive green marble resin and warm bronze-plated nib and trim.
Top-down view of the uncapped TWSBI ECO Serpentine Bronze fountain pen and its cap resting on a dark grey textured slate surface. A smooth, mottled green serpentine stone sits in the foreground, visually echoing the pen's earthy olive green marble resin components and rich vintage bronze accents.
Perfectly horizontal profile of the capped TWSBI ECO Serpentine Bronze fountain pen centered on a pure white background. The clean composition emphasizes the clear demonstrator barrel, the earthy swirled olive green and grey marble resin cap and blind cap, and the rich bronze-plated pocket clip and trim ring.
Top-down view of the uncapped TWSBI ECO Serpentine Bronze fountain pen and its detached cap arranged diagonally on a pure white background. The shot details the bronze-plated nib, internal piston mechanism, and the matching earthy swirled olive green marble resin components.
Uncapped, angled view of the TWSBI ECO Serpentine Bronze fountain pen resting on a seamless white background. The photograph highlights the bronze-plated steel Jowo nib, the clear high-capacity ink barrel, and the distinct swirled olive green and grey marble resin piston knob.
Angled product photograph of the fully capped TWSBI ECO Serpentine Bronze fountain pen on a pure white background. The image clearly displays the striking contrast between the swirled olive green and grey marble resin cap and piston knob, the vintage bronze-plated trim, and the clear demonstrator barrel.
Moody, dramatic product photograph of the uncapped TWSBI ECO Serpentine Bronze fountain pen and its cap resting on a highly textured, natural wooden log against a dark background. The organic wood grain beautifully complements the pen's swirling olive green marble resin and warm bronze-plated nib and trim.
Top-down view of the uncapped TWSBI ECO Serpentine Bronze fountain pen and its cap resting on a dark grey textured slate surface. A smooth, mottled green serpentine stone sits in the foreground, visually echoing the pen's earthy olive green marble resin components and rich vintage bronze accents.

TWSBI ECO Piston Filler Fountain Pen - Serpentine Bronze

$58.00
/
Shipping calculated at checkout.
Nib Size
  • Edition: Serpentine Bronze — Special Edition featuring a swirling, earthy blend of olive green and smoky grey marble resin paired with premium vintage bronze plating
  • Nib: Bronze Plated Steel — Precision Jowo stainless steel nib plated in bronze to perfectly match the trim
  • Filling Mechanism: Piston Filler — Internal piston draws ink directly into the barrel (approx. 1.76ml capacity)
  • Ink Capacity: Massive — Holds nearly 4x more ink than a standard converter
  • Body: Crystal Clear — Transparent barrel allows you to see your ink level and color at all times
  • Maintenance: Fully Serviceable — Includes wrench and silicone grease for home disassembly
  • Dimensions: 139 mm capped, 168 mm posted — Hexagonal cap prevents rolling and posts securely
  • Origin: Made in Taiwan — Precision engineered for durability

About the TWSBI ECO Piston Filler Fountain Pen – Serpentine Bronze

The TWSBI ECO Piston Filler Fountain Pen – Serpentine Bronze is a breathtaking Special Edition that brings a touch of luxurious vintage warmth and natural elegance to the reliable ECO lineup. Elevating the standard demonstrator design, this pen features a captivatingly swirled cap and piston knob inspired by natural serpentine stone—blending rich olive greens and smoky greys—perfectly complemented by elegant Bronze-plated trim and a matching bronze-plated nib.

The ECO (short for "Economical") is celebrated for bringing high-end piston filling mechanisms to an accessible price point. The built-in piston allows you to fill the pen directly from a bottle, holding a massive 1.76ml of ink. The crystal-clear barrel not only lets you monitor your ink level at a glance but also turns your ink of choice into a visual centerpiece against the dark, organic marble accents.

Designed for flawless daily use, the cap features an inner seal to prevent the nib from drying out, even if left unused for extended periods. The distinct hexagonal cap prevents the pen from rolling off your desk, while the smooth, round grip section ensures a remarkably comfortable writing experience.

True to TWSBI’s philosophy of user empowerment, the pen arrives in a presentation box that includes a bespoke wrench and silicone grease, giving you the freedom to fully disassemble, clean, and lubricate the mechanism yourself—ensuring your tool lasts a lifetime.

In Stock & Ready
Every tool is personally dispatched from our hubs within 48 hours (2 business days).

Standard Tracking (Registered Airmail)

  • United States: USD 14.99 | FREE over USD 150
    [✔ Duties & Taxes: Prepaid by Us]
  • Rest of the World: USD 8.99 | FREE over USD 99
  • Fully tracked to your doorstep via national post or local courier.

Expedited Priority (FedEx/DHL)

  • United States: USD 39.99 (3–5 Business Days)
    [⚠ ~$30 Carrier Fee: Billed to Recipient*]
  • Rest of the World: USD 29.99
  • The fastest global route via premium express couriers.

Our Logistics Commitment
Orders are handled at our precision fulfillment centers in Hong Kong or Taiwan. For our US community, we absorb import tariffs on Standard Shipping to keep rates fair.

*Note: US Expedited couriers invoice recipients directly for individual customs clearance and administrative fees (typically ~USD 30).

Rates are listed in USD; our system automatically converts these to your local currency at checkout.

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