• Dynamic Bass

    Serial nos 1001 - c. 1300

  • Dynamic Bass

    Serial no. 1135

  • Later Dynamic Basses

    Serial nos 2000 - c. 2300

  • JMI Foundation Bass

    Serial nos 1001 - c. 1600

  • An early Foundation Bass

    No serial no. plate

  • Foundation Bass no. 1443

    Late summer 1967

  • VSEL Foundation Bass

    Serial nos 2000 - c. 2430

  • VSL Foundation Bass

    Serial nos 2430 - c. 2900

  • Foundation Bass cabs

    Details and pics

  • Circuit diagrams (schematics)