The Opus 88 Harmony fountain pen is a truly unique writing instrument. The Harmony is an eyedropper-filled pen with a piston operated shut-off valve.
An ebonite piston and rubber gasket seals the feed off from the barrel when fully depressed, reducing the risk of leakage and burping. By unscrewing the blind cap and loosening the rod at the rear of the barrel, you open up the ink flow to the feed. During long writing sessions, leave the shut-off valve open to take advantage of the impressive ink capacity. Having a transparent pen barrel allows you to see your current ink level.
