Fisher Space Pen luxury pen – limited edition with Celtic knot engraving

The Fisher Space Pen 400BTN-CK is the brand’s first model and remains the most sought-after to this day. This limited edition combines precision engraving with a black titanium nitride coating – one of the hardest and most abrasion-resistant coatings used in medicine and the aerospace industry.

The engraving covers 360 degrees – both the cap and the body of the pen. Each pen spends up to 31 minutes on the engraving machine. In person, the Celtic knot design impresses with a three-dimensional depth that photographs cannot fully capture.

Technical specifications of the Fisher Space Pen 400BTN-CK

Length when extended: 13.6 cm
Length when retracted: 9.6 cm
Barrel: brass and steel with a black titanium nitride coating
Refill: SPR4 – black ink, medium nib
Compatible with all Fisher PR refills
Tungsten carbide nib
Cardboard gift box

Why the Fisher Space Pen writes where others fail

The refill contains a pressurised nitrogen cartridge that forces the thixotropic ink through – it is solid when at rest, but liquefies when writing. The pen never runs out, never leaks and writes up to three times longer than standard ink.

It works reliably at temperatures ranging from -34°C to +120°C, underwater, in zero gravity and at any angle. Its compact size means it can be carried in a wallet or bag, or clipped to a pocket.

A gift for men – practical and prestigious

The Fisher Space Pen is a suitable gift for doctors, lawyers, military personnel, police officers, business leaders, teachers and school leavers. The pen doesn’t freeze in winter or run in summer – it’s reliable in all conditions.

Every pen is hand-tested and comes with a lifetime guarantee against manufacturing defects. 🖊

The story behind the Fisher Space Pen

During the early NASA missions, astronauts used pencils. In 1965, Paul S. Fisher designed a pen that would work in zero gravity, underwater and at extreme temperatures. The company invested around 1 million US dollars of its own funds, without any funding from NASA.

In 1967, following rigorous testing, NASA equipped the Apollo mission astronauts with these pens. In February 1969, the Soviet Union also purchased 100 pens and 1,000 refills for the Soyuz missions. To this day, astronauts from around the world rely on the Fisher Space Pen.

Frequently Asked Questions

What is the black titanium nitride coating and why is it special?

Black titanium nitride is an extremely hard and abrasion-resistant coating. It is used in medicine to coat implants and in the space industry to enhance the wear resistance of components. Applied to the Fisher Space Pen 400BTN-CK, it provides lasting protection for the barrel and gives it a distinctive dark finish. The coating is one of the most durable ever applied to a writing instrument.

How does the Fisher Space Pen’s refill work, and why doesn’t it leak?

The SPR4 cartridge contains a pressurised nitrogen cartridge. A small metal cylinder pushes the thixotropic ink, which is solid when at rest and only liquefies when writing. This design prevents the ink from leaking or drying out. The pen writes up to three times longer than standard ink and is hermetically sealed.

Under what conditions can the Fisher Space Pen 400BTN-CK write?

The pen performs reliably at temperatures ranging from -34°C to +120°C. It writes underwater, in zero gravity and at any angle. It does not freeze in the cold or run in the heat. It is ideal for carrying in your car, rucksack or everyday bag as a reliable writing tool in all conditions.

How long does it take to engrave the pen with the Celtic knot design?

The engraving on the 400BTN-CK model covers 360 degrees – both the cap and the barrel. Each pen spends up to 31 minutes on the engraving machine. The design was developed by Fisher’s in-house team and creates a three-dimensional effect that is particularly impressive in person. Photographs fail to convey the full depth and beauty of the Celtic knot.

What warranty is offered with the Fisher Space Pen 400BTN-CK?

Every Fisher Space Pen is precision-assembled and hand-tested. The product comes with a lifetime guarantee against all manufacturing defects. The guarantee covers defects in materials and workmanship, but not mechanical damage resulting from misuse. Dulotec.COM offers full support in the event of any issues with the product.

Who would appreciate an engraved Fisher Space Pen as a gift?

The Fisher Space Pen 400BTN-CK is a suitable gift for men and women in a variety of professions. It is ideal for doctors, lawyers, military personnel, police officers, teachers, business leaders and school leavers. The pen is both practical and prestigious – it boasts an interesting history and technology that makes for great conversation. It comes in a cardboard gift box, ready to give.

Which refills is the Fisher Space Pen 400BTN-CK compatible with?

The 400BTN-CK model comes with an SPR4 refill – black ink with a medium line width. The pen is compatible with all Fisher PR refills. The refill tip is made of tungsten carbide, ensuring smooth and consistent writing. The refill can be easily replaced when necessary.