Up for sale is a magnificent piece of British writing history: an Onoto "The Pen" No. 6234 plunger-filler fountain pen, manufactured in Great Britain by the prestigious Thomas De La Rue & Co. Ltd.

Famed as the pen brand of choice for Sir Winston Churchill, Onoto instruments represent the pinnacle of mid-20th-century pen engineering, combining massive ink capacity with an innovative, completely leak-proof safety valve system.

Design & Mechanics: This specific 6234 model features an elegant, understated Chased Black finish with a deeply engraved pattern that provides a wonderful tactile feel in the hand.
It utilizes Onoto’s proprietary Plunger (Vacuum) Filling System. When the blind cap is screwed down tight, an internal shut-off valve seals the ink chamber completely, making this vintage beauty 100% leak-proof and entirely safe for modern air travel.

Condition & Details

• Cosmetics: Excellent vintage condition. The chased pattern on both the cap and barrel remains exceptionally crisp, with deep, sharp lines and very minimal pocket wear. The barrel bears clear, legible "Onoto The Pen" factory imprints.
  

• Nib: Features a large, original 14K Gold Onoto Nib number 5. It is a smooth, expressive writer with that classic hint of spring and responsiveness that makes vintage British nibs so desirable.

• Mechanism: Fully serviced and restored to perfect working order. The plunger rod, specialized internal washers, and rear packing seals have been fully renewed to ensure a powerful vacuum and a flawless fill.