I am very impressed with my Opus 88 Koloro Demonstrator. It looks fantastic, especially when it is filled with a beautiful ink color. The eyedropper system works well and the rubber ring keeps it from leaking. The nib is smooth and responsive. This is, simply put, an excellent pen.
You can purchase the Opus 88 Koloro Demonstrator from Pen Chalet for $120.00. If you’ve ever wanted to try an eyedropper pen but have been put off by how expensive they can be, this is the perfect fountain pen for you. And, if you think the Opus 88 Koloro Demonstrator might be too big for your hand, you can try the smaller versions (also eyedroppers) that come in various colors and cost $93.00 at Pen Chalet.
Pros
- The Opus 88 Koloro demonstrator is a well-made pen that feels substantive in your hand.
- Because it is an over-sized pen with an eyedropper filling system, it holds a huge amount of ink.
- The Jowo nib on my Opus 88 writes flawlessly.
- I really like the look of this pen with the frosted barrel, cap, and matte black clip. Because it is a demonstrator, it will show off whatever ink you fill it with.
Cons
- This over-sized pen might be too big for some people, but smaller Opus 88s are available (though not in the clear demonstrator version).
- One thing you have to remember with this pen is to unscrew the piston knob before you start writing. I don’t find this bothersome at all, but it is an extra step.
(This purchase was made with my own funds from Pen Chalet.)