Legacy Metrics

1930 Alfa Romeo 6C 1750 Third Series Super Sport Spider

0312957roadItaly
Engine
1,752cc supercharged DOHC inline six-cylinder, single Solex carburetor, approx. 85 bhp at 4,500 rpm

Chassis 0312957 is one of just 52 supercharged Alfa Romeo 6C 1750 Super Sport examples built, completed in September 1930 as the 116th third-series car and bodied in the two-seat racing style associated with Carrozzeria Zagato. Italian registration records document its early ownership chain before export to Britain in late 1933. Subsequent British custodians included actor James Robertson Justice, Alfa Romeo historian Roy Slater, and VSCC participant Hamish Moffat, after which the car passed to American sculptor Stanley Wanlass. The car has never previously appeared at public auction.

Ownership

  1. 2023-08-18Auction sale
    Estimate US$1,600,000 – US$1,900,000

    Bonhams catalogue lot →

  2. 1930-09-17 → 1932-03-22Factory delivery
    Alfa Romeo (factory)
    full documentation

    Italian registration records show the car transferred internally within Alfa Romeo on the day after its certificate of origin was issued, possibly for competition use given the 'da corsa' body description.

  3. 1932-03-22 → 1932-05-27Private sale
    Luca Alessio
    full documentation

    Purchased from Alfa Romeo for 32,000 Lire but held the car for only about two months before it returned to factory ownership.

  4. 1932-05-27 →Private sale
    Alfa Romeo (factory)
    full documentation

    Car reverted to factory ownership after brief private ownership; subsequently passed to further Italian private owners.

  5. → 1933-12-15Acquisition unknown
    Alfa Romeo (factory)
    partial documentation

    The car returned to Alfa Romeo once more before its final sale on the Italian records.

  6. 1933-12-15 →Private sale
    James Street
    full documentation

    Final custodian on Italian registration records, listed care of RACI Milano; his anglicised name suggests he likely arranged the car's export to Britain, consistent with its first UK licence being issued late 1933 to early 1934.

  7. 1952-11-01 →Private sale
    Jack Bond Vintage Autos (dealership)
    partial documentation

    The car appeared in a November 1952 advertisement by this dealership following its time with Justice, described as freshly overhauled and resprayed.

  8. Date unknownAcquisition unknown
    Francesco Cherubini
    partial documentation

    One of two further Italian private owners listed in the registration records between the factory's second tenure and the car's final Italian custodian.

  9. Date unknownAcquisition unknown
    Adolfo Carminati
    partial documentation

    Italian owner appearing in registration records alongside Cherubini; the car returned to Alfa Romeo again after this ownership.

  10. Date unknownAcquisition unknown
    Mr. Noakes
    partial documentation

    Early British owner appearing in the ownership chain prior to James Robertson Justice; no further details recorded.

  11. Date unknownAcquisition unknown
    James Robertson Justice
    partial documentation

    Noted British actor and automotive enthusiast whose other vehicles included a Gullwing Mercedes; the car was described in a 1952 advertisement as recently serviced and refinished, and attributed to a well-known film star.

  12. Date unknownAcquisition unknown
    Mr. Simmons
    partial documentation

    Owned the car between the Vintage Autos dealership sale and Roy Slater; no further details known.

  13. Date unknownAcquisition unknown
    Roy Slater
    partial documentation

    Distinguished Alfa Romeo historian and among the founding members of the Alfa Romeo Register in 1956; co-authored several reference works on the marque. The car was advertised for sale on his behalf by Major W.J. Boddington of Roydon, Essex.

  14. Date unknownPrivate sale
    Hamish Moffat
    partial documentation

    Active Vintage Sports Car Club participant who restored the car, re-registered it as 'AR 1750', and modified the bodywork by panelling over the hood tray and luggage compartment. Possibly the last British owner before the car moved abroad.

  15. Date unknownAcquisition unknown
    Stanley Wanlass
    partial documentation

    American sculptor listed among the notable former owners; appears to have owned the car after it left the UK.

Competition

No competition history extracted from the catalogue.

Maintenance & restoration

  1. 1952Engine rebuild
    Vintage Autos

    Complete engine overhaul carried out at a stated cost exceeding £200, with only around 150 miles accumulated since completion at the time of the 1952 advertisement.

    Work was referenced in a Jack Bond 'Vintage Autos' dealer listing in November 1952; a new hood and full exterior respray in Alfa red were carried out at the same time.

  2. 1952Bodywork
    Vintage Autos

    Entire car resprayed in Alfa red and fitted with a brand-new hood, concurrent with the engine overhaul before sale.

    Recorded in the same November 1952 dealer advertisement.

  3. Restoration

    Restoration carried out by Hamish Moffat during his ownership; the hood/top tray and small hinged luggage compartment were panelled over to form a single uninterrupted surface.

    Moffat undertook the work personally; the car was photographed in various publications under his ownership wearing the revised rear bodywork and the 'AR 1750' registration.

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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.