---
title: "One-Off Cars & Unique Coachbuilt Models · HICONIUM"
description: "Discover one-off cars and unique coachbuilt models, with production details, design history and the provenance documented in each vehicle file."
canonical_url: https://hiconium.com/models/one-offs
image: https://hiconium.com/og/default.png
---

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![Rows of car silhouettes receding into a dark archive, one nose cropped hard at the frame edge](https://hiconium.com/_derived/images/models/models-hero-v1.jpg.w1920.q75.webp)

The model index · one-offs

# Built once, priced alone

The cars with no comparable — where the record has to be perfect because there is nothing else to lean on. Drawn from the same ledger of 219 documented models.

23 cars · [the full index](https://hiconium.com/models)

A car enters this list when the catalogue records a single example built — a commission, a prototype that stayed alone, a coachbuilt body never repeated. Small series are not one-offs and are not here; where a marque built two or three of something, the model keeps its place in the main index and the count is stated on its file.

The distinction is a pricing one before it is an editorial one. Everything else in the register can be triangulated against its siblings; these cars cannot. Their valuation rests on provenance, condition and the documented history of the one chassis that exists — which is why their files are the ones we ask the most of.

- [Mercedes-Benz 300 SLR "Uhlenhaut Coupé" 1955 Vintage EUR 135,000,000](https://hiconium.com/manufacturers/mercedesbenz)
- [Porsche 911 GT1 Straßenversion 1997 Modern EUR 6,000,000](https://hiconium.com/manufacturers/porsche)
- [Rolls-Royce Boat Tail 2021 Current EUR 25,000,000](https://hiconium.com/manufacturers/rollsroyce)
- [Koenigsegg CCXR Trevita 2009–2011 Modern EUR 5,000,000](https://hiconium.com/manufacturers/koenigsegg)
- [Aston Martin DBR1 1956–1959 Vintage EUR 20,000,000](https://hiconium.com/manufacturers/astonmartin)
- [Rolls-Royce Droptail 2023– Current EUR 25,000,000](https://hiconium.com/manufacturers/rollsroyce)
- [McLaren F1 GT 1997 Modern EUR 22,000,000](https://hiconium.com/manufacturers/mclaren)
- [McLaren F1 LM 1995–1996 Modern EUR 25,000,000](https://hiconium.com/manufacturers/mclaren)
- [Ferrari F12 TRS 2014 Modern EUR 4,000,000](https://hiconium.com/manufacturers/ferrari)
- [Ferrari KC23 2023 Current EUR 3,500,000](https://hiconium.com/manufacturers/ferrari)
- [Bugatti La Voiture Noire 2019 Current EUR 16,000,000](https://hiconium.com/manufacturers/bugatti)
- [Ferrari Modulo 1970 Classic EUR 5,000,000](https://hiconium.com/manufacturers/ferrari)
- [Ferrari Omologata 2020 Current EUR 4,500,000](https://hiconium.com/manufacturers/ferrari)
- [Koenigsegg One:1 2014–2015 Modern EUR 5,000,000](https://hiconium.com/manufacturers/koenigsegg)
- [Ferrari P540 Superfast Aperta 2009 Modern EUR 2,500,000](https://hiconium.com/manufacturers/ferrari)
- [Ferrari P80/C 2019 Current EUR 5,500,000](https://hiconium.com/manufacturers/ferrari)
- [McLaren Sabre 2021 Current EUR 3,000,000](https://hiconium.com/manufacturers/mclaren)
- [Lotec Sirius 2000–2001 Modern EUR 1,500,000](https://hiconium.com/manufacturers/lotec)
- [Ferrari SP12 EC 2012 Modern EUR 3,000,000](https://hiconium.com/manufacturers/ferrari)
- [Ferrari SP48 Unica 2022 Current EUR 2,800,000](https://hiconium.com/manufacturers/ferrari)
- [Rolls-Royce Sweptail 2017 Current EUR 11,000,000](https://hiconium.com/manufacturers/rollsroyce)
- [Bugatti Type 57 SC Atlantic 1936–1938 Vintage EUR 40,000,000](https://hiconium.com/manufacturers/bugatti)
- [Aston Martin Victor 2020 Current EUR 3,000,000](https://hiconium.com/manufacturers/astonmartin)