Pilot Custom 823

The Pilot Custom 823 fountain pen utilizes a unique vacuum-filling mechanism. Instead of traditional cartridges or a standard piston, the user twists the top knob to push a plunger, creating a vacuum that draws ink directly into the large barrel. This allows the pen to hold a massive volume of ink.

The Custom 823 features a 14-karat gold nib, renowned for its slight softness and smooth writing experience. The nib comes in Fine, Medium, or Broad sizes to accommodate different writing preferences. It is finely engraved with a stylized heartbeat pattern and the Pilot logo.

Yes, the Pilot Custom 823 is designed as a demonstrator pen, meaning the barrel is made of translucent, tinted plastic to reveal the inner ink capacity. It is available in three colors: Amber, Clear, and Smoke. This design allows writers to easily see their ink levels and the inner vacuum mechanism.

Because the Custom 823 is a vacuum filler and holds a lot of ink, drastic changes in cabin pressure during flights can cause leaks if the pen is not properly sealed. To prevent this, you should ensure the plunger is tightly locked down into the closed position before boarding. It is highly recommended to travel with the pen completely full or completely empty to avoid air expansion.