Legacy Metrics

1953 Jaguar XK 120 Roadster

674160roadUnited Kingdom

A 1953 Jaguar XK 120 roadster with a documented history spanning several American owners. Acquired from its first owner in unrestored condition, the car underwent a meticulous four-year restoration carried out by multiple specialists with parts sourced from leading UK suppliers. Subsequently maintained by a noted Jaguar expert in New York, it later passed to a prominent collector who used it extensively on long-distance rallies and exhibited it at prestigious concours events, earning a class award at Boca Raton.

Ownership

  1. Auction sale
  2. 1953 →Factory delivery
    Original owner
    partial documentation

    Believed to be the first owner; exact tenure end date not stated.

  3. 2000 → 2011Private sale
    Owner acquired via Doc's Jags
    partial documentation

    Purchased through noted Jaguar dealer Doc's Jags; vehicle was maintained during this period by Jaguar specialist Kurt Braunstein in East Hampton, New York.

  4. 2011 →Private sale
    Collector and enthusiast
    full documentation

    Well-known enthusiast who drove the car extensively across the US, added a new soft top and tonneau cover in 2012, and participated in multiple long-distance rallies. History file includes substantial invoices covering work from 2012 to 2017.

  5. Date unknownPrivate sale
    Steven Sigwarth
    partial documentation

    Cedar Rapids, Iowa resident who undertook a thorough multi-year restoration using specialists in Iowa and Illinois, sourcing many components from UK suppliers. Work spanned approximately four years.

Competition

  1. 2017
    Copperstate 1000

    One of three 1,000-mile touring rallies entered by the car during this ownership period.

  2. 2017
    The Quail Motorsports Gathering

    Car was displayed at this prestigious automotive showcase in 2017.

  3. New England rally

    First of two separate 1,000-mile rallies routed through the New England region.

  4. New England rally

    Second of two separate 1,000-mile rallies routed through the New England region.

  5. Boca Raton Concours d'Elegance
    Excellence in Class

    Car received a class award at this event, described as having taken place the year prior to cataloguing.

Maintenance & restoration

  1. 2012
    Bodywork

    New black convertible soft top and a matching tonneau cover fitted as part of supplementary restoration work.

  2. 2012
    Modification

    Several convenience upgrades added, including a replacement choke and a discreetly concealed mobile phone charger under the dashboard.

  3. 2017
    Service

    Car was prepared and maintained in rally-ready condition for participation in multiple 1,000-mile events.

    Invoices totalling over $70,000 cover work carried out between 2012 and 2017 and are included with the vehicle's history file.

  4. Restoration
    Tremains Automotive; Simonson's; Riverside Sports Cars

    Full restoration carried out over roughly four years while in the care of Steven Sigwarth, using local specialists Tremains Automotive, Simonson's of Taylorville, and Riverside Sports Cars of Swisher, Iowa. The majority of parts were obtained from UK suppliers Guy Broad and XK Engineering.

    The original cylinder head had at some point been replaced prior to restoration; the engine block was verified against factory records via a Jaguar Heritage certificate.

  5. Service
    Kurt Braunstein

    Ongoing maintenance and upkeep carried out by Jaguar specialist Kurt Braunstein during the post-2000 ownership period.

    Braunstein was based in East Hampton, New York.

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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.