The TWSBI ECO, shown here in Clear, is a classically styled fountain pen with a piston ink-filling system, smooth-writing steel nib and a screw-on cap, at a lower price point than any of the other TWSBI fountain pens thus far. The traditional mechanism of the fountain pen, combined with a modern industrial design, embodies both the past and the present. This pen runs about the same in length as the Diamond 580 and is just a tiny bit thinner.
The TWSBI ECO piston ink-filling system uses only bottled ink and the clear body allows the user to view the level of ink remaining in the pen at all times. One difference between the ECO fountain pen and the other TWSBI pens is that the ECO does not have a removable nib unit, and the barrel and nib unit are all one piece. There will not be separate nib units for this pen.
This pen is now my daily shirt pocket pen. The clear parts allow my gradsons to see how a fountain pen works. The stub nib is smooth and just what I expected.
MichaelMay 29th 2018
Love this writing instrument. This is a very nice pen.
The Pen PenchantNov 20th 2017
Cost to Features - Outstanding
I did a full review on YouTube, but the takeaway is you get a good pen with a good nib using a filling system usually reserved for pens at least three times as expensive. This is my first and definitely not my last TWSBI Eco.