Legacy Metrics

1965 Shelby 427 Cobra (CSX 3125), street-spec converted to SCCA A-Production race configuration

CSX 3125roadUnited States
Engine
427 cubic inch V8, side-oiler block, with aluminum cylinder heads
Colour
Blue with white stripes

CSX 3125 is the 25th coil-spring 427 Cobra built, originally a street-specification example delivered in September 1965 to a Texas dealership and quickly converted by its first owner to full SCCA A-Production racing trim using factory-sourced Shelby components. It compiled an impressive period competition record, including Northeast Division championships in 1968 and 1969 under John Paul Sr., before eventually passing to European ownership and later undergoing a comprehensive restoration returning it to its period blue-with-white-stripes racing livery and specification.

Ownership

  1. Auction sale
    Estimate US$1,250,000 – US$1,500,000

    RM Sotheby's catalogue lot →

  2. 1965 →Private sale
    Ron Lambeth
    partial documentation

    Dallas, Texas resident believed to be the original retail owner; shortly after purchase he converted the car to SCCA A-Production specification using components obtained directly from Shelby.

  3. 1965-09-17 →Factory delivery
    Gene Hamon Ford
    full documentation

    Receiving dealership in Texas City, Texas; car was invoiced to this dealer on the date noted.

  4. → 1970Acquisition unknown
    John Paul Sr.
    partial documentation

    Burlington, Massachusetts racing driver who campaigned the car very successfully in SCCA competition; placed a for-sale advertisement after the 1969 season detailing the car's race record.

  5. 1970 → 1974Private sale
    Sylvia Smith
    partial documentation

    South Burlington, Vermont owner who acquired the car through her driver Paul Chroinere, partly exchanging a road-spec 427 Cobra; she campaigned it through 1971 and offered it for sale in early 1972 but retained it until 1974.

  6. 1974 → 1980Private sale
    Peter Sheridan
    partial documentation

    London, England owner who had the car shipped to the UK, registered it as RRB 500, and returned it to road use.

  7. 1980 → 1996Private sale
    Rolf Saxer
    partial documentation

    Swiss owner who held the car for approximately sixteen years.

  8. 1996 → 2005Private sale
    Bertold Theussen
    partial documentation

    Xanten, Germany owner who commissioned a thorough restoration beginning in 1997; paint removal confirmed original and race livery layers and verified the car retained its original chassis, body, drivetrain, and interior.

  9. 2005 →Private sale
    Mr. Fonvielle
    partial documentation

    Had the car sent to a respected Cobra specialist for a further restoration returning it to as-raced appearance with blue and white stripe livery; original components were preserved where possible.

Competition

  1. 1966SCCA
    SCCA Regional Races 1966
    Driver: Ron Lambeth

    Car raced in multiple regional events during this season after conversion to A-Production specification.

  2. 1967SCCA
    SCCA Regional Races 1967
    Driver: Ron Lambeth

    Continued regional competition during the 1967 season, leading to qualification for the national championship.

  3. 1967SCCA
    1967 American Road Race of Champions
    Driver: Ron Lambeth

    Held at Daytona; car qualified for this national championship event.

  4. 1968SCCA
    SCCA Northeast Division Championship 1968
    Driver: John Paul Sr.1st, Northeast Division

    Per the owner's own advertisement, the car also won the Area 1 title this year.

  5. 1969SCCA
    SCCA Northeast Division Championship 1969
    Driver: John Paul Sr.1st, Northeast Division

    Combined record for the two seasons under this driver was eleven wins and two second-place finishes from fifteen starts.

  6. 1971SCCA
    1971 American Road Race of Champions
    8th in class, 14th overall

    Held at Road Atlanta; car ran a freshly built engine and was the top-finishing A-Production Cobra in the field. Period photographs of this event are included in the car's documentation.

Maintenance & restoration

  1. 1965
    Modification

    Street-specification car converted to SCCA A-Production racing trim by its first owner: wheels widened, larger brakes fitted, competition windscreen, roll bar, side pipes, 36-gallon fuel tank, and aluminum cylinder heads added, all sourced directly from Shelby.

    Components were ordered through Lew Spencer at Shelby American; Spencer's direct contact number was recorded in the owner's manual.

  2. 1970
    Mechanical

    Drivetrain and chassis refreshed and the exterior repainted prior to sale.

    Work carried out while the car was unsold following John Paul Sr.'s 1969 advertisement.

  3. 1974
    Service

    Car recommissioned for road use following export to the UK, and registered for street use.

  4. 1997
    Restoration

    Full restoration commissioned by the German owner; paint stripped to reveal original white base coat beneath the blue-with-white-stripe racing livery. Confirmed that original chassis, body, engine, transmission, and interior were all present and intact.

    Work began in 1997 following purchase in 1996.

  5. 2005Restoration
    Cobra specialist (unnamed)

    Comprehensive restoration to as-raced specification carried out by a respected Cobra specialist. Car returned to blue-with-white-stripes livery; original seats and interior retained. Engine block replaced with a correct side-oiler unit as the original was beyond economical repair; new aluminum cylinder heads fitted to preserve the originals as spares.

    As many original components as possible were retained; replaced parts were kept with the car. A substantial collection of original parts accompanies the vehicle.

Are you the owner of this car?

This car's public record is built from its auction and competition history. Register your ownership and privately add your own records to make it a verified Legacy Metrics passport — provenance that backs your car's value at sale and gives your insurer evidence to price against. Roy reviews and verifies every registration personally.

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.