MAJOHN P139 Expedition Oversized Fountain Pen | No.8 Nib,Full Brass Piston

Built for Those Who Write with Conviction

The MAJOHN P139 Expedition is not a pen for the timid. This is a large-format, enthusiast-grade fountain pen engineered for writers who appreciate the weight of history in their hand. Featuring a full solid brass piston mechanism, a No. 8 / 40-type nib, and a hard rubber (ebonite) feed, the P139 draws from the golden age of fountain pen craftsmanship — and delivers it with modern precision.

Key Features

• Oversized "Expedition" Format: A large, commanding barrel designed for writers with bigger hands or those who simply prefer a substantial pen with presence.
• No. 8 / 40-Type Nib: A wide-format nib that delivers expressive, generous ink flow — ideal for bold scripts, journaling, and artistic writing.
• Hard Rubber (Ebonite) Feed: The classic ebonite feed regulates ink flow with exceptional consistency, especially with wetter or specialty inks. A hallmark of vintage-inspired, enthusiast-grade pens.
• Full Solid Brass Piston Mechanism: Machined from solid brass for smooth, precise ink filling and long-term mechanical reliability. No plastic internals — built to last decades.
• Vintage-Inspired Aesthetic: Timeless design language that appeals to collectors and daily writers alike — a pen that looks as good on a desk as it writes on paper.
• Enthusiast / Collector Grade: Designed for fountain pen aficionados who demand premium materials and mechanical integrity over mass-market convenience.

The Enthusiast's Choice

Most pens are made to be used. The P139 is made to be experienced. The satisfying resistance of the brass piston, the smooth glide of the ebonite feed, the generous ink deposit of a No. 8 nib — every element is intentional. If you've been searching for a pen that rewards attention and grows with your craft, the MAJOHN P139 Expedition is your answer.

Specifications

• Brand: MAJOHN
• Model: P139 Expedition
• Size: Oversized / Large Format
• Nib Size: No. 8 / 40-Type
• Feed Material: Hard Rubber (Ebonite)
• Filling System: Full Solid Brass Piston
• Barrel Material: Resin
• Aesthetic: Vintage / Retro
• Target User: Fountain Pen Enthusiasts, Collectors, Advanced Writers
• Ink Compatibility: Standard fountain pen ink; compatible with wetter and specialty inks

Frequently Asked Questions

Q: What does "oversized" mean for the P139, and who is it best suited for?

A: The P139 Expedition is a large-format pen with a longer, wider barrel than standard fountain pens. It's ideal for writers with larger hands, those who prefer an unposted writing experience, or enthusiasts who simply appreciate a pen with physical presence and gravitas.

Q: Why does the P139 use a hard rubber (ebonite) feed instead of plastic?

A: Ebonite feeds are a hallmark of vintage and high-end fountain pens. Hard rubber is more ink-compatible than plastic, especially with specialty, shimmer, or high-saturation inks. It also provides more consistent ink flow regulation over time, making it a preferred choice among serious fountain pen users.

Q: What is a No. 8 / 40-type nib and how does it write?

A: A No. 8 nib is one of the largest standard nib sizes, offering a wider tine spread and a more generous ink flow than No. 5 or No. 6 nibs. The result is a bolder, more expressive line with a smooth, wet writing experience — particularly satisfying on quality paper.

Q: Why is the piston made from solid brass instead of plastic?

A: Solid brass pistons are more durable, smoother in operation, and more resistant to wear than plastic alternatives. The added weight also contributes to the pen's satisfying balance and premium feel. It's a deliberate engineering choice for longevity and mechanical pleasure.

Q: Is the P139 suitable for everyday carry and use?

A: Absolutely. While the P139 is enthusiast-grade, it's fully functional as a daily writer. Its large ink capacity means fewer refills, and the robust brass piston mechanism is built for years of reliable use. Just be mindful of its size when selecting a pen case or pocket carry.

Q: What inks work best with the P139?

A: The ebonite feed makes the P139 particularly well-suited for wetter inks, high-saturation dyes, and even some shimmer inks that can challenge plastic feeds. Standard fountain pen inks work excellently. Avoid heavily pigmented or India inks not formulated for fountain pens.