Opus 88 Pens

I have had this pen about a week now, and I love it. I like demonstrators anyway, and this pen has a very interesting filling system. The pen is a smooth writer out of the box (it seems to have a JoWo nib). I bought the medium nib, and I like it with sheening inks particularly. I recommend the pen, especially during sale periods when it is quite affordable and an interesting choice.

I love the looks of this pen within my collection. Be aware, it’s a bigger pen. My collection runs along the Lamy, TWSBI, Pilot varieties. This big boy has a grip section that feels more like a child’s kindergarten crayon in comparison. But I’m getting used to it. The cap doesn’t post, but the pen feels balanced without it, and even full of ink, it’s not too heavy. I worried about that, as I have arthritis, but it’s not like a brass pen would be. The mechanism that allows you to close off the ink between the barrel and the feed still lets you write for a good long time, AND opening and closing that thing seems to get ink moving toward to nib when you need it, too. Overall, I really like the pen. I haven’t used it a whole lot yet, and have only had one ink in it so far (it holds a LOT of ink). I have Robert Oster Forest Green in it right now and I love it. This pen was a gift to me and I’m super grateful.

Excellent Fountain Pen. A real looker too! I would highly recommend this pen to any collector; she’s a stand out. Huge reservoir for ink. Never runs out!!! Love it! Love it! love it! Another winner from Pen Chalet. Thank you! Anthony

I love this Pen. I love it's size, large. I think the stainless steel nib is very good. I had both a broad and a medium. The broad was so smooth with just a very very small hint of feedback, which I consider to be perfect. Ti was a great steady writer and fairly wet.
The medium nib also wrote very smooth with the same or slightly more feedback but very minimal over all. I love the way it writes. It is very dependable as regards ink flow.
If you like larger, beautiful pens, this is the one. Great ink capacity as a eye dropper, and it is absolutely nice to look at with your favorite ink color moving about in its barrel. Enjoy.

This pen is a real gem. Having had some eyedropper fillers in the past, I was some hesitant since they all had some kind. of problem. This pen has a piston governor on
it, so I decided to try it. There has been no leakage at all, and I do not keep the piston closed either. It is there if I need it, but otherwise not really necessary from my experience under most normal conditions. Writing with this pen is sheer pleasure. Ink flow is great, and the nib is a smooth writer with an excellent line width (M nib). Based on my experience, I can recommend this pen without hesitation.

I absolutely love this pen. I guess I'm a minimalist, but every aspect of this pen hits the right notes. Even with its striking looks, it's an excellent writer. I'd definitely buy another one...so I did!

Outstanding fountain pen. Well made, aesthetically appealing, written well and smoothly. Pen has good weight and size. Great pen and pleasure with which to write.

Bought the demonstrator first but want to get the others for their colors and am not disappointed. I'm going to have to go Pokemon and collect them all.

Absolutely love this pen. Ever since learning about the old Japanese eyedropper with it's shut off valve, I've wanted one. Until this came out my only option was finding a vintage pen and hope the seals were still good or pay five to six hundred times the price for a base model top tier pen.

Arrived well packaged to the UK. The pen is just beautiful and works perfectly well. I just love everything about it. Thank you for the fast and efficient service

Firstly the service I received from Pen Chalet was absolutely wonderful. I received the pen so promptly it felt like the store was in my same city! Secondly I really like this pen. I purchased it at a great price so I couldn’t ask for a better experience! I’m definitely ordering from this business again. I don’t know what took me so long!

Writes smooth out of the box. Materials feel great in the hand. Very cool system to prevent burping make this the best eyedropper pen on the market. Love it.

I really like the looks of this pen; that's what drew me to it. I like the ebonite tan sections alternated with the pale teal translucent sections. I like the fact that it is an eyedropper and that I have to open the back knob to write with it. All of that is good old-fashioned stuff that lures many fountain pen users to certain models. Now, on the minus side: I got a M nib, but it didn't write like a M. It wrote more like an EF. And I like fat nibs. So, on a hunch, I pulled out my box of spare nibs. Fished out a TWSBI MINI 1.1 mm stub. Not the 580, or the Vac 700, or the Vac mini, but the regular mini. Unscrewed the nib & feed on the Opus, then unscrewed the nib & feed on the TWSBI. Then, to my amazement and disbelief, the TWSBI nib screwed right into the opening on the Opus and it works like a dream. So I've essentially got a TWSBI pen in an Opus body. Awesome! The nibs are the same size (#5) and if you own a TWSBI, well, you know how their nibs write. Pretty darn good. Now that I have switched nibs, I am very happy with my Opus 88 Koloro. One thing I must mention: I have very small hands, and when posted, the Opus is way too big for me to write much with. My hand would get sore and tired. However, unposted, it's pretty comfortable. So: Lord help me, I might consider one of the other color models. I like them all. That's where the obsession comes in. If you are happy with the Opus narrow nib, or if you don't mind switching a TWSBI nib into it to get a fatter one, then I recommend this pen for you. I mainly recommend it based on its looks. It also functions very well, as far as the filling system and shut-off valve goes. It's a very good pen. But I say that based mainly on its appearance. It just appeals to me, in all its color offerings.

Liked the smaller blue on blue so much i got the larger demonstrator. It's superb! Too not service as I've come to expect.

This is a very well made to and a superb value. Writes reliably. A+++ pen with A+++ customer service from Pen Chalet!

I was intrigued by this pen whilst reading a review on wellappointed desk. Did some more research and decided to take the plunge, as I have yet to have an eye-dropper pen in my collection.

I ordered the M nib version, which I find a bit too much like European F nib, a replacement is on the way.

It wrote straight out of the box, nib is nice and smooth with just a hint of feedback. I like the size and the pen does not become "top heavy" when posted.
Last but not least it hold "a lot" of ink.

I normally look for and write with vintage fountain pens, however, once and a while a modern pen catches my attention. This was the case with the Koloro Opus 88. I've never owned an eye dropper fill pen and this one is easy to fill and writes very well. I love the design! Thanks to the nice folks at Pen Chalet for the free and prompt shipping. I will be back!

What a lovely surprise. This pen has one of the smoothest #6 nibs I own. I got a medium nib. The pen works great. Holds a ton of ink without any worry of leakage. It is a bigger pen than I am use to but I am really enjoying using it. It does not post but I do not post my pens anyway. This is a great pen for the value! I highly recommend it.

Excellent construction and performance

This is a quality pen. I have been using for a few weeks and have had absolutely no issues with it. It is easy to fill and just as easy to flush out.

So, I have to honest - I was really sceptical about this pen, but I decided to pull the trigger anyway. And I think this was really a good buy. The quality on the pen is quite exceptional, I mean, the nib ALWAYS aligns to the back of the cap, so you could clearly see the nib when the pen is capped. The pen holds quite a large amount of ink, and it does not write as wet as I expected. I was blown away by the quality of the pen, and I think if you like dark demonstrators, this might be the pen for you!

Great pen. Very happy with it. Love the ink control rod with the ability to close off the ink supply.

The Opus 88 is a great pen! The blue/tan is a great combo, and the steel nib is wonderfully smooth. The filling system is very easy to use, and it’s nice to not always have a cartridge/converter system. As usual, Pen Chalet’s customer service can’t be beat. No joke, pick up this pen!

A very cool looking pen which writes quite nicely. My only complaint is that the ink migrates under the barrel into the nib theads, which is somewhat unsightly, particularly since it doesn’t occur evenly.

The Opus 88 is such a pleasant surprise! I didn’t quite know what to expect from a sub-$100 fountain pen from a brand I’d never heard of. But you’ve got a gem, my friend! It’s so well made and so well finished. The presentation is gorgeous. It writes beautifully. And the eyedropper system with the “rod” in the middle is genius to keep the ink from getting trapped behind a large bubble of air. I also like that by screwing back down the blind cap, you can effectively shut the pen off which may make it safer for flight / travel.

I think this pen would easily fit in the $150-200 range and I’d recommend it over just about any other sub-$100 fountain pen anywhere. The only caveat being that eyedropper pens can be a bit polarizing with some people being totally open to them while others aren’t comfortable with them. But if you can get past that (and why wouldn’t you since they include a very high quality glass filler!?), this thing is a GEM!