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    • (Page 201)
  • J H Dallmeyer SER XIV projection lens

    J H Dallmeyer SER XIV projection lens

    £220

    View details
    Hatchwell Antiques

    Hatchwell Antiques
    GB

  • UNUSUAL DOUBLE STOPWATCH

    UNUSUAL DOUBLE STOPWATCH

    $85.

    View details
    TESSERACT

    TESSERACT
    US

  • Prototype design for an aircraft propeller boss

    Prototype design for an aircraft propeller boss

    £585

    View details
    Hatchwell Antiques

    Hatchwell Antiques
    GB

  • Victorian Celluloid Desk Magnifying Glass in Case by CW Dixey London

    Victorian Celluloid Desk Magnifying Glass in Case by CW Dixey London

    £695.00

    View details
    Jason Clarke Antiques

    Jason Clarke Antiques
    GB

  • A DIVERSITY OF SLIDE RULES

    A DIVERSITY OF SLIDE RULES

    Various -- see listing

    View details
    TESSERACT

    TESSERACT
    US

  • Antique ophthalmology electromagnet of Prof. Dr Hirschberg

    Antique ophthalmology electromagnet of Prof. Dr Hirschberg

    Euro 290

    View details
    Nautilus Antiques

    Nautilus Antiques

  • Electromagnet by Ferninand Ernecke.

    Electromagnet by Ferninand Ernecke.

    € 145,-

    View details
    Van Leest Antiques

    Van Leest Antiques
    NL

  • Ruhmkorff Commutator, 1930

    Ruhmkorff Commutator, 1930

    € 110,-

    View details
    Van Leest Antiques

    Van Leest Antiques
    NL

  • BRASS PRODUCTION PLATE FOR SLIDE RULES

    BRASS PRODUCTION PLATE FOR SLIDE RULES

    SOLD

    View details
    TESSERACT

    TESSERACT
    US

  • EXCEPTIONAL MATHEMATICAL SECTOR

    EXCEPTIONAL MATHEMATICAL SECTOR

    $9500.

    View details
    TESSERACT

    TESSERACT
    US

  • Open scale barograph by C F Casella & Co, circa 1960

    Open scale barograph by C F Casella & Co, circa 1960

    £1100

    View details
    Hatchwell Antiques

    Hatchwell Antiques
    GB

  • Six late 19th and early 20th-Century Probangs

    Six late 19th and early 20th-Century Probangs

    Various

    View details
    M and R Gordon

    M and R Gordon
    US

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