Opus 88 Demo yellow fountain pen

The Opus 88 Demonstrator is a sturdy fountain pen made of acrylic length closed 147.5 mm. The pen has a steel nib available in different line widths.. 

The pen must be filled with the included eyedropper pipette, as is also common in some Japanese fountain pens. Connected to the rear cap, there is a rod in the holder with a gasket inside at the other end to separate the ink guide and reservoir. Slightly loosening the back knob allows the ink guide to be supplied with ink. Tightened again, the two compartments are separated and the large ink supply of approx. 3 ml is safely stored.en.

Since 1988, Opus has been producing vital parts for various other stationery manufacturers as an OEM supplier. In 2017 it was decided to release pens under its own label under the brand name "Opus 88".