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SKU
C-M7442080
TWSBI ECO Serpentine with Bronze Fountain Pen
£50.00
In stock
(1) 
Gift Wrap
We offer a professional giftwrap service to complement your pen or leather journal. Simply check the giftwrap option on the product page before you add to basket (a charge of £3.25 will be added).
We use a premium silver giftwrap paper with a subtle two-tone patterned effect, and a hand tied silver ribbon. We also include a matching gift tag, which can be appended with a message of your choice. Simply add your message to the text box when you reach your basket. Items are giftwrapped individually i.e. if you order several items only the specific item requested will be wrapped.
We do not include any paperwork inside the giftwrapped item. If you select a different delivery name to your billing details, we add a gift receipt which hides all prices.
Nib size guide
- Smooth steady ink flow
- Distinct line variances
- EF particularly fine
Inspired by the rich, earthy tones of natural stone, the TWSBI ECO Serpentine edition pairs a swirling marbled cap with warm bronze detailing, creating a truly eye-catching writing instrument. The clear demonstrator body allows a full view of the inner workings and ink level, celebrating the mechanical beauty TWSBI is known for. The hexagonal cap, finished in a deep blend of forest greens, ambers, and smoky greys, is complemented by a gleaming bronze clip and cap ring. A matching bronze stainless steel nib offers a smooth, consistent writing experience with just the right amount of flex and feedback.
Built with a high-capacity piston-fill mechanism, the ECO Serpentine is perfect for those who want to write longer without refilling. A rubber O-ring ensures a secure seal, protecting against leaks and evaporation when the screw-on cap is in place.
As with all ECO models, the pen can be fully disassembled for cleaning and maintenance – tools included – though TWSBI recommends this only for experienced users.
Key Features
- Unique Serpentine marbled cap with bronze trim
- Polycarbonate construction creates scratch resistant, resilient and crystal clear finish
- Hexagonal shaped cap and piston mechanism tip
- Twist action piston fill mechanism
- Stainless steel (in Bronze) nib with intricate TWSBI logo and detailing
- Screw close cap
- Rubber O-ring prevents leakage and drying
- Gently tapered grip section
- TWSBI logo button on end cap
- TWSBI presentation box
- Lifetime manufacturer warranty
- Dimensions (Closed): L 140mm x D 15mm
- Dimensions (Posted): L 168mm x D 15mm
- Diameter taken at widest point (not including clip)
- Weight: 21g
This is why people love it
Loads of good customer reviews submitted through feefo
Written on 13-Jul-2025
I love it!
Delivery Information
All orders placed before 3pm Mon-Fri are despatched the same day (except on a bank holiday), even if your order has personalisation. Orders placed after 3pm, at the weekend or on a bank holiday are despatched next working day.
UK: We use a Royal Mail tracked service. Standard delivery is free over £30 (£2.50 charge for orders under £30) and takes 2 to 5 working days, Premium is £3.50 and takes 1 to 2 working days. Next working day is £6.95 and is delivered by 4pm (requires a signature).
International: We deliver worldwide with a standard and express service. Please visit our international website
Returns Information
Please return any unwanted items within 21 days of purchase to be eligible for an exchange/refund. The item must still be in a re-saleable condition and returned with proof of purchase. Items that have been personalised cannot be returned unless they are faulty.
Should you receive a damaged or incorrectly dispatched item, please inform us within 7 days of receipt, so we can advise you on the return of the item. Call 0208 731 8610 or email info@penheaven.co.uk. If a faulty or incorrect item is returned, we will refund your postage up to the cost of 1st class recorded Royal Mail. If you are sending items from abroad, please call us for a delivery quote
Compatible Refills and Items
This is why people love it
Loads of good customer reviews submitted through feefo
- Written on 13-Jul-2025I love it!