Opus 88 Demonstrator Fountain Pen

For anyone seeking a traditional eyedropper-filled fountain pen, the Opus 88 demonstrator has a lot to offer. It features a combination of clear and frosted resin, so you can see the ink level and the nib when the pen is capped. But what really sets the Opus 88 apart is its piston-operated shutoff valve. The ebonite piston and rubber gasket seal the feed off from the barrel when fully depressed to prevent leaking and burping. Unscrew the blind cap and loosen the rod at the rear of the barrel to open up the ink flow to the feed. During long writing sessions, you can leave the shutoff valve open to take advantage of the pen’s large ink capacity.