Opus 88 Demonstrator Green is the 2024 special edition of this beautiful pen with a perfect cylindric design with flat shape. It features a green body with fluo yellow and aqua green details. The fountain pen is equipped with a JoWo #6 steel nib with black PVD.
Opus 88 Demonstrator comes with an eyedropper filling system. To fill the pen you have to unscrew the grip part, insert ink with the included pipette, and screw again the grip section. Now you are ready to write but you need to unscrew the end blind cap.
Eyedropper filling system from Opus 88 has a large ink capacity with a valve that opens and closes flow. Open the valve when you need to write for long session and close it when you want to carry the fountain pen in your bag (or for example on flight!).