on saleTWSBI ECO Fountain Pen - Indigo Blue w/ Bronze Trim

Product Code TW-M7449560

In Stock

out of stock

on saleTWSBI ECO Fountain Pen - Indigo Blue w/ Bronze Trim

Product Code TW-M7449560

In Stock

out of stock

Nib Guide

Not sure which size nib is best for you?

Try our Nib Nook tool to view and compare nib widths using our writing samples. Learn more ›

The TWSBI ECO fountain pen boasts an incredible value with its piston filling system and affordable price. Like many other TWSBI fountain pens, it features a crystal clear acrylic barrel so you can see your ink level, and an opaque indigo blue cap and finial. The pen cap has an inner cap to ensure a perfect seal when stored away. It is completed with bronze trim and a bronze-colored stainless steel nib.

TWSBI's belief is that it is important to allow the user to disassemble and reassemble the pen and completely experience the traditional aspects of owning and using a fountain pen. These pens also come packaged with a wrench and silicone grease. Neither of these accessories are intended to be used immediately, as they are for long-term care and maintenance. Additionally, please use extra care if you choose to disassemble the nib and feed, as the feed is very fragile.
Fountain Pens
Blue, Clear

Whether or not the barrel of the pen is translucent, allowing you to see the ink and filling mechanism inside.

Body Material
Cap Rotations

For pens with a screw-cap closure, how many rotations it takes to uncap/recap the pen.

Cap Type

How the cap is opened/closed from the barrel of the pen. Some common options include Snap-Cap, Screw-Cap, Magnetic Cap, or Capless (no cap).

Compatible inks & refills

Which ink this pen will accept. Choices include bottled ink and various styles of pre-filled ink cartridges.

Bottled inks
Filling Mechanism

How the pen fills with ink. Click here to watch our video tutorial on common filling mechanisms.

Grip Material
Nib Size
Extra-Fine, Fine, Medium, Broad, 1.1mm Stub
Nib Color
Nib Material

Whether or not the cap fits securely onto the back of the barrel when open.


Whether or not the nib/tip can retract into the body of the pen (usually for click or twist-open style pens).

Diameter - Body
12.8mm (0.50in)
Diameter - Cap (without clip)
14.9mm (0.59in)
Diameter - Cap (with clip)
17.3mm (0.68in)
Diameter - Grip (mm)

Measured from the place most people choose to rest their fingers, which varies with each pen.

Length - Body

The measurement from the back end of the barrel to the tip of the nib.

131.6mm (5.18in)
Length - Cap
60.4mm (2.38in)
Length - Nib

The measured length of the visible portion of the nib when it is installed in the pen, from grip to tip.

18.5mm (0.73in)
Length - Overall (Closed)
138.8mm (5.46in)
Length - Overall (Posted)

When the cap of the pen is posted onto the back of the pen body, this is the measurement of the entire pen including the nib.

167.5mm (6.59in)
Weight - Body

If a converter is included with the pen, this weight is reflected in the total.

13g (0.46oz)
Weight - Cap
8g (0.28oz)
Weight - Overall (g)
Max Ink Capacity - Piston Vac

The maximum volume of ink that can fit in the pen when using the built-in piston or vacuum filling mechanism.


Customer Reviews

Based on 44 reviews
Fun times!

I have been wanting to pick up a TWSBI for a long time. When I saw the Indigo Blue ECO with Bronze trim: I had to pull the trigger.

Truth is, I am one of those that as a pen seems to be drier than it should be, waning on the amount of ink laid down, I tend to bleed the air out of a cartridge converter.

The TWSBI ECO tends to run dry and I don't dare bleed the air out and leave it for obvious reasons. Also, I will need to tune the nib some as it seems to be on the scratchy side. But for the nib, I may have given it five stars. I may revise it after I have been able to work with the nib some.

Robin S.
My first fountain pen!

This is a lovely pen and the first of what I'm hoping will be a collection! I paired this pen with the Wearingeul Ink From the Earth to the Moon, and it is perfect! Thank you!

Liz D.
Nice pen & holds alot of ink.

I got this pen as I liked the gold nib and pen pocket holder of the same color. The nib is a broad. My only drawback, is I wish I got a different color pen, like the black, or eggplant or a gold one. Maybe they call it sunset.
I heard Japanese nibs are smaller than the German nibs, and I am happy with the size. lthough after having a flex nib (Monte Blanc Noblesse Oblique new circa 1985, I prefer flex nibs. I previously ordered a Kaweco sport with a medium nib, as the others were out of stock. While in NYC, I purchased a broad nib and feel it writes thinner than the Japanese nibs.
So I am a bit confused.

I am glad I didn't get a Twisbi 580 -700 as the length of the Eco is plenty long. I like how the cap twists.

Thanks to Brian K at Goblet for assisting with this order.

Excellent quality pen and beautiful combination of colors

I am a new pen enthusiast (and am well on my way to becoming an addict!) This was my first TWSBI ECO and it is exceptional! The pen feels great in my hand, and the clear plastic demonstrator is gorgeous with whatever ink is in it. This pen will hold GALLONS of ink! (maybe not gallons but a lot of ink nonetheless). The indigo-blue version is over-the-top gorgeous. A drawback is that the rose gold is impossible to keep clean. Another drawback is that although the nibs are somewhat interchangeable, TWSBI does not make interchangeable nibs in rose gold. One would have to purchase a new pen to match the nibs. If you decide to purchase this pen, get the nib you want unless you don't mind a stainless steel nib.

Another winner!

I just received another beautiful addition to my modest pen collection - the TWSBI ECO in indigo blue with bronze trim. Love it!!! This color combination is stunning and looks very elegant. The color in the photo looks like Prussian blue to me, but is actually a bit darker. I've managed to locate some Endless Alchemy ink in Candy Sea especially for this pen and can't wait for it to arrive. I know there are other specs and technical details that would be helpful in a review, but I'll leave that for people who are a lot more knowledgeable about those things than I am. For me, it's about the experience and enjoyment of using a beautiful writing instrument. TWSBI pens do that for me. I've had so much fun going down this rabbit hole I call "fountain pen heaven". If you are on the fence about purchasing this pen or just fountain pens in general, take the leap. You won't be disappointed. One last thing. Purchasing from Goulet Pens continues to be one of the best online shopping experiences. You've come to the right place.

FAQs about Fountain Pens

How do I fill a fountain pen with ink? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

It depends on the pen's filling mechanism, which you can find in the Technical Specs section above. 

Here's a quick definition of the most common filling mechanisms:

  • Cartridge - A small, disposable, sealed plastic reservoir that holds fountain pen ink. These come pre-filled with ink, and typically you just push to insert them into place and you'll be ready to write! Check out our quick guide here.
  • Converter - A detachable and refillable ink reservoir that allows you to use bottled ink in a cartridge-accepting pen. Typically you will install the converter into the grip section, dip the nib/feed into the ink, and twist or pull the converter knob to draw ink into the converter. Here's a video for how to fill a cartridge/converter pen using a LAMY pen as an example.
  • Eyedropper - A pen that utilizes the entire barrel as a reservoir for ink. Ink is directly filled into the barrel, allowing for a high ink capacity. Here's a video on how to do it!
  • Piston - A type of filling system that uses a retracting plunger inside a sealed tube to draw ink into a pen. They are typically either twist or push-operated. These pens cannot accept cartridges or a converter, and only fill from bottled ink.
  • Vacuum - A push-style piston that uses pressure to fill the large pen body with ink. They seal the ink chamber when closed, making it ideal for flying without risk of leaking. Check out our video on how to use a vac filler here.

Check out more info on these filling mechanisms including a video on how to fill each one on our blog.

How do I clean a fountain pen? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

It depends on the filling mechanism, but it mostly comes down to flushing it out with water, and sometimes a little bit of Pen Flush if the ink is really stuck. 

It's a bit easier to show than to tell, so we've put together a few quick videos showing you the process:

How often do I need to clean my fountain pen? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

We recommend a good cleaning every 2 weeks, and any time you change ink colors. 

Water will usually do the trick, but we recommend you use our Goulet Pen Flush if the ink has been left in the pen for a while and could have dried up, or when you’re switching ink colors.

My pen won’t write! What do I do? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

First things first... make sure you have ink in the pen! Be sure that the ink cartridge or converter is seated properly in the pen, and that you aren't out of ink.

We always recommend you give your pen a good cleaning first, using our Goulet Pen Flush, or a drop of dish soap in some water. New pens often have some machining oil residue left in the feed, so a good cleaning often does the trick first.

If that still doesn't work, try priming the feed. This consists of either dipping your pen nib and feed in ink, or forcing ink from the converter down into the feed. 

If it’s still not working after that, please reach out to us so we can help! 

What's your return policy? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

You can submit a return request within 30 days of your order date. You can read all our Return Policies here.

To initiate a return, please submit a request at the Return Portal. Our Customer Care team might reach out to you for more information.

Please note we are unable to accept a return of any Namiki or Sailor Bespoke fountain pen for any reason once it has been used with ink. Please thoroughly inspect and dry test the pen before use.