SKU: 25226324093

Heretic Knives Koschei Prototype Knife – Carbon Fiber Chassis, Hand Ground High Polish M390 Blade – Serialized – Made in USA (S/N 024)

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Description

Heretic Knives Koschei Prototype Knife – Carbon Fiber Chassis, Hand Ground High Polish M390 Blade – Serialized – Made in USA (S/N 024)A preview of whats next. The Koschei Prototype represents an early look at what may become one of Heretics most important upcoming releases. Built in extremely limited numbers, this prototype offers a rare opportunity to experience the design before full production begins. This is not just another configuration. It is a development piece, refined, adjusted, and ultimately selected to move the platform forward. And this one is individually serialized:

A preview of what’s next.


The Koschei Prototype represents an early look at what may become one of Heretic’s most important upcoming releases. Built in extremely limited numbers, this prototype offers a rare opportunity to experience the design before full production begins.

This is not just another configuration. It is a development piece, refined, adjusted, and ultimately selected to move the platform forward.

And this one is individually serialized: S/N 024.

 


 

 

Specifications

• Model: Koschei Prototype

• Serial Number: 024

• Blade Steel: M390

• Blade Finish: Hand Ground, High Polish

• Handle: Carbon Fiber Chassis

• Construction: Prototype / Pre-Production

• Country of Origin: USA

 


 

 

The Meaning Behind “Koschei”

The name Koschei comes from Eastern European folklore, often associated with the idea of something that cannot be easily destroyed because its essence, its “soul,” is hidden and protected elsewhere.

It is a fitting name for a knife like this.

Because the value here is not just in the materials or the finish. It is in the intention behind the design, the refinement process, and the craftsmanship that goes into shaping what this knife will eventually become.

This is where that “soul” begins.

 


 

 

Prototype Level Craftsmanship

Prototype pieces carry a different kind of weight.

They represent the stage where ideas become real. Where design meets function. Where adjustments are made by hand, not just by machine.

The hand ground high polish M390 blade reflects that process. Clean, deliberate, and finished with a level of attention that stands out even among high-end production knives.

Paired with a carbon fiber chassis, the result is lightweight, strong, and visually refined.

 


 

 

Serialized and Limited

This is not a standard release.

Prototype runs are inherently limited, and each piece carries its own place in the development of the model. The serialization marks it as part of that early story.

For collectors, that matters.

 


 

 

Why This One Stands Out

There are production knives, and then there are pieces that represent a moment in a maker’s evolution.

The Koschei Prototype sits firmly in the second category.

It offers a look at where Heretic is going next, while standing on its own as a finished, fully realized piece.

 


 

 

Supporting American Craftsmanship

Heretic continues to build their knives in the United States, focusing on materials, machining, and finishing that reflect a high standard of production.

The Koschei Prototype shows what that process looks like before the broader release.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 25226324093

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Judy Bernhard
New York, US
★★★★★ 5
Came as described
My order came exactly as described and in a very timely fashion. Very pleased with this purchase.
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Reviewed in the United States on December 7, 2025
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Verified Purchase
Derrick
Natrona Heights, US
★★★★★ 4
Genuine parts that keep my S1 Pro running like new
Fit & Quality: Everything fit perfectly on my Eufy Omni S1 Pro — the rollers snapped right in, and the filters matched the originals exactly. You can tell these are genuine Eufy parts, not knockoffs. Performance: After swapping the brushes and mop roller, my vacuum immediately started cleaning better again. Suction improved, and it picked up fine dust I hadn’t noticed before. Ease of Use: Installation took less than ten minutes. Everything comes sealed and labeled clearly, which makes it simple to replace parts without guessing. Value: It’s a little pricey compared to third-party kits, but the quality and compatibility are worth the extra few bucks. Verdict: Solid replacement set that restores performance to like-new.
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Reviewed in the United States on November 2, 2025
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Tom Mulé
Cuba, US
★★★★★ 5
Great aftermarket substitute items
Great quality and fit
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Reviewed in the United States on December 16, 2024
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Guy Charles
Pawtucket, US
★★★★★ 5
Must have along with the Eufy S1 Pro...
A very nice addition to an already great product.
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Reviewed in the United States on April 29, 2025
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Verified Purchase
Scoot.man
Dallas, US
★★★★★ 5
Good quality
Good quality replacement parts
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Reviewed in the United States on October 1, 2024

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