Opus 88 Demonstrator Fountain Pen Mocha Mousse

The Opus 88 Demonstrator is the signature model from the Taiwanese brand. A fountain pen with a perfectly cylindrical shape and flat ends, featuring a large ink reservoir and a clean, distinctive design.

This special edition is inspired by the Pantone Color of the Year 2025: an elegant Mocha Mousse brown. The glossy resin barrel is paired with darker brown accents, while the transparent amber grip section allows a glimpse of the ink flow. A refined and modern contrast, perfect for those who love timeless design with a contemporary touch.

As with all Opus 88 models, the filling system is eyedropper: unscrew the nib unit and fill the pen using the included pipette. Once reassembled, simply open the tail-end valve to start writing.

This filling system offers a large ink capacity and allows you to open and close the flow between the reservoir and the nib, making the pen ideal for safe transport—whether in a backpack or on a plane.