Legacy Metrics

1956 Mercedes-Benz 300 SL Gullwing Coupé

198.040.6500223roadGermany
Engine
Fuel-injected overhead-cam straight-six, inclined, NSL spec with competition camshafts
Colour
Silver gray (restored from original blue-grey)

Chassis 198.040.6500223 is a Mercedes-Benz 300 SL Gullwing coupé finished from the factory in the rare Blue Grey (DB 166) over green leather combination — one of only four delivered in this colour. Specified with a 1:3.42 rear axle and an NSL-specification engine carrying 'code 00' competition camshafts dated January 1956, it was first registered to a Stuttgart-area brickworks proprietor before passing through several West Coast American owners. A full restoration to Silver Grey was undertaken by specialist Scott Grundfor Company, after which the car entered a single long-term collection in 1988.

Ownership

  1. Auction sale
    Estimate €1,700,000 – €2,100,000

    RM Sotheby's catalogue lot →

  2. 1973 →Acquisition unknown
    Franklin Burns
    partial documentation

    Resident of Petaluma, California; commissioned a full restoration to Silver Gray with blue leather by specialist Scott Grundfor Company, then located in the San Fernando Valley.

  3. 1988 →Private sale
    Current consignor
    partial documentation

    Acquired the car immediately upon completion of the Grundfor restoration and has kept it in continuous personal collection since that time.

  4. Date unknownFactory delivery
    J. Blank, Hohenz Ziegelwerke
    partial documentation

    Original recipient per the factory build record; operated a brick manufacturing facility near Stuttgart, Germany.

  5. Date unknownAcquisition unknown
    Gordon Donaldson
    partial documentation

    Seattle, Washington resident who is believed to have brought the car to the United States; the connection is described as probable rather than certain.

  6. Date unknownAcquisition unknown
    John R. Winblad
    partial documentation

    Based in San Francisco; part of the car's West Coast ownership sequence.

Competition

No competition history extracted from the catalogue.

Maintenance & restoration

  1. Restoration
    Scott Grundfor Company

    Full restoration carried out to Silver Grey finish, with blue leather interior, a coordinated fitted luggage set, and Rudge wheels fitted; chassis and engine number stampings confirmed original though identification tags were renewed in keeping with practice of the period.

    Workshop was then located in the San Fernando Valley; commissioned by Franklin Burns prior to 1988 sale.

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.