The Opus 88 Demonstrator fountain pen in Sapphire is a truly unique writing instrument. This large non-postable pen is an eyedropper-filled pen with a piston operated shut-off valve. Featuring a...

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...

Opus 88 Demonstrator Pink is the 2024 special edition of this beautiful pen with a perfect cylindric design with flat shape. It features a pink body with purple and aqua...