Piston Filler Type fountain pen. Simply twist the end knob open and closed to fill the pen with ink.

Acrylic cap, grip, body, end cap.
Rose gold nib, clip, rings.
Limited Run, Special Edition.

Comes in EF, F, M, B nib sizes.

The TWSBI Obsidian is an elegant fountain pen with a deep black marbled body complemented by warm rose gold accents. Inspired by the natural strength and beauty of obsidian, this pen combines refined aesthetics with the reliable engineering TWSBI is known for. Thanks to the piston filling system, the pen can be filled directly from an ink bottle and offers an impressive ink capacity.

The stainless steel nib delivers a smooth and controlled writing experience, making the TWSBI Obsidian perfect for daily writing, note-taking, and creative work. As with all TWSBI models, the pen can be fully disassembled for cleaning and maintenance, ensuring long-term performance and writing pleasure.

A wonderful choice for writers and collectors who value design, functionality, and comfort in a dependable fountain pen.

Key Features:
High quality acrylic body with obsidian appearance
Rose gold coloured accents
Piston filling system
Smooth stainless steel nib
Can be disassembled for cleaning and maintenance