TWSBI Obsidian Fountain pen

The TWSBI Obsidian Fountain Pen combines reliable engineering with an elegant, modern aesthetic, making it an excellent choice for both everyday writers and pen enthusiasts. Featuring a smooth piston-filling mechanism and a clear ink window, this pen allows you to monitor your ink level at any time—perfect for long writing sessions or on-the-go creativity.

Its standout feature is the dark marbled resin body, inspired by the depth and mystery of natural obsidian stone. The subtle, swirling pattern adds a sophisticated touch while preserving the functional clarity and durability TWSBI is known for. Designed for comfort, balance, and consistent ink flow, the TWSBI Obsidian is a dependable writing companion for journaling, note-taking, and creative projects.

Key Features

• Piston-Filling System for high ink capacity and easy refilling
• Clear Ink Window to monitor ink levels at a glance
• Dark Marble Resin Body with elegant obsidian-like pattern
• Durable Construction designed for everyday use
• Smooth Writing Performance with a choice of nib sizes

Whether you're expanding your TWSBI collection or searching for a stylish, high-performance fountain pen, the TWSBI Obsidian offers a perfect blend of beauty, function, and value. Let your writing shine with the depth and character of this stunning marbled piston-filler.

With a history of more than 40 years of manufacturing, including producing high-end pens for other brands, Ta Shin Precision decided to start selling under their own brand, TWSBI. The name TWSBI is made up from TWS and BI. ‘TWS’ is the reversed initials of the phrase ‘San Wen Tong’, translated Hall of Three Cultures, and ‘BI’ literally means writing instrument.