Legacy Metrics

1968 Mazda Cosmo Series II (L10B)

L10B-10732roadJapan
Engine
982cc twin-rotor Wankel, single Zenith Stromberg carburettor, 128 bhp

A 1968-series Mazda Cosmo Sport L10B, this Series II example represents the refined iteration of the world's first twin-rotor production car, featuring a 128 bhp rotary engine, five-speed gearbox, and a longer wheelbase for improved refinement. Delivered new for the Japanese domestic market, it passed through a succession of enthusiast owners in the same region of Japan, was serviced by the local authorised Mazda dealer, and arrived at auction in recently overhauled condition with approximately 68,500 kilometres believed original.

Ownership

  1. Auction sale
    Estimate £130,000 – £160,000

    RM Sotheby's catalogue lot →

  2. → 2001
    Multiple Japanese enthusiast owners in the same region
    partial documentation

    A succession of enthusiast keepers, all located in roughly the same part of Japan, with the car regularly serviced by the local authorised Mazda dealer throughout.

  3. 2001 →Private sale
    Previous Japanese owner
    partial documentation

    Kept the car in indoor storage from 2006 onward until selling to the consignor.

  4. Date unknownPrivate sale
    Current consignor
    partial documentation

    Sourced the car from a Japanese collection and had it mechanically refreshed by Japanese specialists, including an engine overhaul at 58,000 km.

Competition

No competition history extracted from the catalogue.

Maintenance & restoration

  1. Service
    Official Mazda dealer (local, Japan)

    Routine servicing carried out by the authorised local Mazda dealer during the car's early ownership years in Japan.

  2. Engine rebuild
    Japanese specialists (unnamed)

    Rotary engine overhauled at the 58,000-kilometre mark by Japanese specialists as part of a broader recommissioning of the car.

    Work commissioned by the current consignor after acquiring the car from a Japanese collection.

  3. Mechanical
    Japanese specialists (unnamed)

    Comprehensive mechanical sorting carried out to bring the car back to proper running order.

    Undertaken at the consignor's direction alongside the engine overhaul.

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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.