Legacy Metrics

1954 OSCA MT4 Spider

1147racingItaly
Engine
Twin-cam aluminum inline-four, under 1500cc displacement
Colour
Red ('Rosso')

Chassis 1147 is one of two OSCA MT4 spiders entered by the factory at the 1954 Le Mans 24 Hours, where it ran as car number 43 driven by Lance Macklin and Pierre Leygonie. After leading its class by 15 laps, the car was disqualified following spectator assistance after an accident in the final hour. Subsequently raced in American SCCA events by James Simpson Jr, the MT4 passed through several owners before a comprehensive refurbishment in the early 1990s and further mechanical work thereafter. It retains its matching-numbers twin-cam engine and carries extensive period documentation.

Ownership

  1. Auction sale
    Sold €1,270,625 (≈ $1.4M)

    RM Sotheby's catalogue lot →

  2. → 1954Factory delivery
    OSCA factory
    full documentation

    Car was entered directly by the factory at the 1954 Le Mans 24 Hours, fitted with competition-spec equipment including a riveted 100-litre fuel tank, vented front brakes, and quick-jack mounts.

  3. 1954 →Private sale
    James Simpson Jr
    partial documentation

    Illinois-based OSCA enthusiast who acquired the car through American marque distributor Edgar Fronteras after it was repaired by Morelli following Le Mans; reportedly campaigned it in SCCA competition through the mid-1950s.

  4. → 1972Acquisition unknown
    George Sterner
    partial documentation

    Pennsylvania resident who purchased the car after Simpson's death in the early 1960s; acquired it without its engine or gearbox.

  5. 1972 → 1989-08-01Private sale
    Frank Stark
    partial documentation

    Obtained the original engine from OSCA specialist Peter Wessel but was unable to fund a complete restoration; held the car for approximately 17 years before selling.

  6. 1989-08-01 → 1995-02-01Private sale
    Scott Borman
    partial documentation

    California-based buyer who carried out a thorough four-year refurbishment of the car.

  7. 1995-02-01 →Private sale
    Consignor
    full documentation

    Commissioned multiple mechanical restorations including a full engine rebuild in 1998, ZF gearbox rebuild in 2006, coachwork refinish in 2012, and interior retrim; maintained the car in active vintage competition. Documentation comprises four binders of research, restoration photos, and invoices.

Competition

  1. 1954-06-12
    1954 Le Mans 24 Hours
    Driver: Lance MacklinDisqualified; unofficial 3rd in class

    Co-driven by Pierre Leygonie, car number 43; built a 15-lap lead over the top Porsche before an incident in the 23rd hour required outside assistance to rejoin, leading to disqualification.

  2. 1954-08-01SCCA
    Lockbourne AFB sports car race
    Driver: James Simpson Jr1st in class

    Class victory at the airfield circuit event in August 1954 while under Simpson's ownership.

  3. 1954-11-01SCCA
    Orange Empire Sports Car Race, March AFB
    Driver: James Simpson Jr1st in class

    Class win at March Air Force Base approximately three months after the Lockbourne event.

  4. 2010Mille Miglia Storica
    2010 Mille Miglia Storica
    Successful outing

    Completed by the consignor as part of ongoing vintage participation.

Maintenance & restoration

  1. 1954Bodywork
    Morelli

    Coachwork damage from the Le Mans accident was repaired at Morelli prior to the car's export to the United States.

  2. 1989
    Restoration

    A thorough, multi-year overall refurbishment lasting approximately four years was undertaken by Scott Borman after acquiring the car.

    Commenced from August 1989; scope described as comprehensive.

  3. 1998Engine rebuild
    Leydon Restorations

    Full rebuild of the matching-numbers twin-cam inline-four engine.

    Carried out during the current consignor's ownership.

  4. 2006
    Mechanical

    Complete rebuild of the all-synchromesh ZF gearbox; the installed gear ratios were optimised to suit the engine's power delivery, improving performance over the standard configuration.

    Work carried out by Nino Epifani.

  5. 2012Bodywork
    Werke Classic Coach

    Exterior coachwork refinished in red by Werke Classic Coach; interior retrimmed in blue leather by Skin and Bones.

    Interior reupholstery by Jonathan Chase's Skin and Bones in Marlborough, Massachusetts.

Are you the owner of this car?

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Each chassis record is compiled from public auction archives and links to its source material. Ownership, competition and maintenance entries are extracted from those catalogue listings by an LLM, which can make mistakes — please contact us with any corrections. The summary is Legacy Metrics’ own writing; we do not reproduce catalogue text.

“Full” and “partial” documentation labels indicate how well each entry is corroborated in the underlying sources, not an audit of the car’s physical paperwork. Names of recent or living owners are withheld for privacy.