As early thoughts go, today’s are even earlier than usual as this lovely pen has been with me for barely 24 hours. However, my first impressions are very favourable: the quality and finish and the sheer fun that you can have with it, exceeded my expectations.

This model has been around for several years now and I am informed by artist Terry Christopherson (Instagram @theTravelSketcher) and of peninkandpaint.com that it is big in the urban sketching community. I was already familiar with another model that I reviewed previously called the Duke 552, also featuring a natural bamboo barrel. I had imagined that the 551 would be similar, but with a fude nib and a more decorated cap. It turns out that they are quite a bit different.
Although the 551 is similar in length and has a similar look of bamboo barrel, black cap with silvertone furniture, it is girthier, heavier, has a much bigger nib and a section which is longer and made of metal. The differences are apparent when the two models are seen side by side.

However, the main difference and reason to buy the 551, is for its amazing, steel fude nib. The nib looks quite alarming at first to anyone not expecting it. The tip is angled upwards, at about 45 degrees and presents a flat surface approximately 4mm long, to the paper.

What I had not fully appreciated before the pen arrived, were two other special features of this fude nib, namely that it has two slits for improved ink delivery and an ink reservoir on top of the nib, so that when used as a dip pen, it needs dipping far less frequently. There are some Chinese characters on the nib, which my wife translated as “special calligraphy nib.”

As well as its dip pen suitability, it is also a cartridge-converter filler and is supplied with a push-in converter. This contains a small coil of metal to serve as an ink agitator, which can be useful. However I saw in a YouTube video review by @chrisrap52 that this little spring does make it harder to flush the converter thoroughly when changing ink colours and he prefers to remove the spring, by unscrewing the metal collar of the converter.

The cap features an engraving of Chinese philosopher Confucius on one side and more Chinese text on the other side. My wife translated this, approximately, as “A kind person loves everybody” which is part of a Chinese saying which continues “and everbody loves him.” There is a nicely decorated finial, a very stiff and strong pocket clip culminating in the Duke crown emblem and decorated metal rings at both top and bottom of the cap.
The cap unscrews in just over one full turn. When screwed on, it meets a rubber O ring, giving a reassuring tightness to the cap. It also makes for a good seal and, from other reviews I have read on Amazon’s site, the nib does not suffer from drying out although I have not had my pen long enough to put this to the test.

I very much like the natural bamboo of the barrel. I think the inside of the barrel may be lined in metal here, and it feels heavier than the Golden Stripe Bamboo barrel of my Duke 552 (23.5 grams as opposed to 16.5 grams).
I do not generally get on with shiny chrome sections, as they can be slippery to hold. However this one is of a substantial size. It tapers slightly towards the nib where there is some engraved ornamentation and then a step up at the end, to stop your fingers sliding onto the nib.
From my initial trials with this pen, I have not found the section to cause difficulty in holding the pen securely. I can keep my thumb on the bamboo barrel for better control. However, I am finding that where the pen rests on my middle finger, the step does feel a little uncomfortable and so it is necessary to draw your finger back from it slightly.
So how does it write? I was very excited to find out. After flushing the nib and feed and the converter, I filled the pen with Noodlers Black, a water resistant ink that would allow me to paint over the ink, once dry, with watercolours without the ink smudging.
The nib is very smooth, as I have read in other reviews. The twin slits, like a music nib, provide a more generous flow of ink to the nib, which is needed when making side strokes with that long fude nib. It covers large areas at a single stroke. It would be great as a redacting pen, for hiding confidential text from a document before disclosure.
The fude nib is designed for calligraphy, allowing for fine lines to be drawn with the tip or very broad strokes with the flat part. It is not a “zoom” nib and there is not an easy way to get a medium width line between these two extremes.
In the right hands, the pen would be great for sketching, as the line width extreme variation, and ease of blocking in areas of colour, are a real benefit. Mine are not the right hands to demonstrate this properly but I enjoyed trying.

As for normal writing with this pen, it is possible but in order to get a fine line, the pen needs to be held upright at a steep angle, as you would for a ball pen. If the pen is allowed to lay back towards a more typical fountain pen angle, the line will be much broader and, with a 4mm line, you would need to write very large letters to avoid all the loops being filled.
It is very early days but already I am enjoying my experiments with the fude nib. It will get through a converter of ink quicker than most pens, particular if used for drawing and blocking in large areas. Before refilling it, I am keen to test out its built-in nib reservoir in dip mode.
Duke 551 Specifications:
- Length capped: 147mm
- Length uncapped: 132mm (I am very happy with this)
- Length posted: 182mm
- Weight (total) 64 grams (compared to 40 grams for the Duke 552)
- Weight uncapped: 37.5g
- Weight, cap only: 26.5 grams
Well, so much for my New Year pen-buying abstinence once again. I made it all the way to 18 January 2024 this time. But then this pen is quite an exceptional piece of kit and I am unrepentant.








