Opus 88 Fountain Pen Demonstrator - Poseidon Blue Endless Exclusive Edition (2025) | Premium Japanese Eyedropper Fountain Pen for Calligraphy, Journaling & Gift Giving

Dive into a world of myth and mystery with Poseidon, our latest Endless Exclusive. Inspired by the god of the sea and the vibrant life that calls the ocean home, this pen captures the ever-shifting beauty of the deep.

The finials gleam like sunlit shallows — a transparent light blue that evokes glimmering surface waters. The body, cast in a translucent warm sea blue, is alive with swirls of deep ocean blue, coral orange, and flashes of golden yellow — reminiscent of darting reef fish , hidden anemones , and the iridescent shimmer of sea creatures in motion.

Finished with a special trident emblem engraved on the cap — a tribute to its mythical namesake. Poseidon is powerful yet graceful. Each pen is a handheld seascape, ready to bring a tide of inspiration to your pages.

Presented in a custom gift box, complete with an exclusive sleeve designed by our in-house artist .

Disclaimer: Please note that the clip is chrome trim, not black. Be sure to review the Youtube Video for more details on the product.

Limited to 200 numbered pieces, Poseidon is a mythical relic for those who feel the call of the deep.

EndlessPens Unwrapped: Peek inside the mythical world of the Opus 88 Demonstrator Poseidon Fountain Pen with our unboxing adventure. Go check it out: 

Specifications
- Type:
- Body Material: Resin
- Cap Type: Screw
- Filling Mechanism: Eyedropper
- Nib Material: Steel

Dimensions
- Capped Length: 147.6mm
- Posted Length: (cannot be posted)
- Length of Body: 136.5mm
- Length of Cap: 63.6mm
- φ Grip: 11.0mm
- Weight: 27 g
- Max Ink Capacity: 3.56ml

Comes With
- Opus 88 Gift Box
- Pipette