3 minute read

There are Defender builders, and then there’s Paul Potratz. Most shops in this space pull from the same catalogue of upgrades: lifted suspension, a LS swap, some leather seats, a paint job. They’re well-executed, sure. But they’re assembled, not engineered. Byzek, the new one-of-one D110 commission from Helderburg Defenders out of Arkansas, is doing something fundamentally different.

I’ve been following the restomod Defender scene for a while, and this one genuinely stopped me mid-scroll.

The Design Brief: James Bond, English Library, Grand Tourer

Potratz says he set out to build a Defender that prioritized smooth lines and what he calls “an English library” for an interior. Which sounds like marketing copy until you actually look at it. The exterior is finished in a proprietary Arctic Grey developed in the Helderburg lab, and it doesn’t behave like a normal automotive color. Depending on the light, it shifts from a pale blue-grey to a deep, near-charcoal. In overcast light it reads moody and restrained. In direct sun it’s almost silver. The James Bond reference isn’t just a PR hook; the color actually earns it.

Helderburg's Byzek D110 interior

The interior follows that same logic. It’s not about ruggedness dressed up in leather, it’s about restraint, craftsmanship, and a kind of understated formality that very few vehicles at any price point pull off correctly.

What Helderburg Is Actually Building

Here’s where Byzek gets interesting beyond aesthetics. Helderburg has re-engineered the drivetrain entirely in-house. Not an off-the-shelf crate motor, not a catalogued suspension kit. The powertrain is a proprietary system developed specifically to deliver the kind of linear, composed power delivery you’d associate with a Grand Tourer, not an off-road truck. That’s a meaningful distinction.

Most restomod builders, even the expensive ones, are expert curators. They source the best available components and integrate them well. That’s craft. What Helderburg is doing is closer to what you see at a coachbuilder: developing systems specifically for their vehicles rather than selecting from what already exists. That’s a much harder thing to do, and it’s a much harder business to run. It also means Byzek is genuinely incomparable. You can’t reverse-engineer this thing by buying the right parts.

Helderburg's Byzek D110 back trunk

Potratz has been clear that Helderburg vehicles are a complete proprietary ecosystem. Byzek is the first real proof of that claim.

Who This Is For

Prices start at $350,000. That number immediately filters the audience to a pretty small group, but it also tells you something about what Helderburg is trying to be. This isn’t a weekend project dressed up in nice photography. The company is positioning directly against coachbuilders and bespoke low-volume manufacturers, which is an ambitious place to compete. The fact that Byzek is a one-of-one commission suggests Helderburg takes that positioning seriously.

If you’re the kind of buyer who finds a Singer 911 or a Radford Huxley interesting on a conceptual level, not just as a status object, Byzek deserves your attention. The Defender platform is still one of the most architecturally interesting starting points in automotive history. What Helderburg has built around it here is, by most measures, the most ambitious interpretation of that platform I’ve seen.

Watch the full cinematic film on YouTube. If this kind of engineering interests you, it’s worth your twelve minutes.