[
  {
    "source_key": "THIOUT1741",
    "citation": "Thiout, Antoine. 1741. Traité de l’horlogerie, mécanique et pratique.",
    "source_type": "primary historical treatise",
    "use": "Early-modern bench tools, turns, wheel and fusee work."
  },
  {
    "source_key": "DIDEROT1765",
    "citation": "Diderot, Denis, and Jean le Rond d’Alembert, eds. 1765. Encyclopédie plates, “Horlogerie.”",
    "source_type": "primary illustrated encyclopedia",
    "use": "Published eighteenth-century tool forms and workshop organization."
  },
  {
    "source_key": "BERTHOUD1763",
    "citation": "Berthoud, Ferdinand. 1763. Essai sur l’horlogerie.",
    "source_type": "primary historical treatise",
    "use": "Precision horology, escapements, regulating, and apparatus."
  },
  {
    "source_key": "REES1819",
    "citation": "Rees, Abraham. 1819–1820. The Cyclopaedia, clock and watch work articles and plates.",
    "source_type": "primary illustrated encyclopedia",
    "use": "Early nineteenth-century British terminology and machinery."
  },
  {
    "source_key": "REID1826",
    "citation": "Reid, Thomas. 1826. Treatise on Clock and Watch Making.",
    "source_type": "primary technical manual",
    "use": "Clock and watch construction, workshop methods, and regulation."
  },
  {
    "source_key": "SAUNIER1887",
    "citation": "Saunier, Claudius. 1887. A Treatise on Modern Horology in Theory and Practice.",
    "source_type": "primary/period technical manual",
    "use": "Nineteenth-century hand tools, lathes, gear, escapement, and repair practice."
  },
  {
    "source_key": "BRITTEN1896",
    "citation": "Britten, F. J. 1896. The Watch & Clock Makers’ Handbook, Dictionary and Guide.",
    "source_type": "period reference manual",
    "use": "Terminology, bench tools, cases, and repair practices."
  },
  {
    "source_key": "FITCH1884",
    "citation": "Fitch, Charles H. 1884. “Report on the Manufacture of Watches.” U.S. Tenth Census.",
    "source_type": "primary government industrial report",
    "use": "American factory machinery, workflow, labor, and inspection."
  },
  {
    "source_key": "HOKE1990",
    "citation": "Hoke, Donald R. 1990. Ingenious Yankees.",
    "source_type": "academic industrial history",
    "use": "American system, machine tools, and interchangeability."
  },
  {
    "source_key": "HOUNSHELL1984",
    "citation": "Hounshell, David A. 1984. From the American System to Mass Production, 1800–1932.",
    "source_type": "academic industrial history",
    "use": "Factory systems, standardization, and mass production."
  },
  {
    "source_key": "WOODBURY1958",
    "citation": "Woodbury, Robert S. 1958. History of the Gear-Cutting Machine.",
    "source_type": "academic technical history",
    "use": "Gear generation, dividing, cutters, and machine development."
  },
  {
    "source_key": "WOODBURY1961",
    "citation": "Woodbury, Robert S. 1961. History of the Lathe to 1850.",
    "source_type": "academic technical history",
    "use": "Turning systems and lathe evolution."
  },
  {
    "source_key": "DECARLE1946",
    "citation": "de Carle, Donald. 1946. Practical Watch Repairing.",
    "source_type": "professional repair manual",
    "use": "Mid-century bench, cleaning, lubrication, and service tools."
  },
  {
    "source_key": "DECARLE1952",
    "citation": "de Carle, Donald. 1952. Complicated Watches and Their Repair.",
    "source_type": "professional repair manual",
    "use": "Escapement, chronograph, and complication service."
  },
  {
    "source_key": "DECARLE1959",
    "citation": "de Carle, Donald. 1959. The Watchmaker’s and Model Engineer’s Lathe.",
    "source_type": "professional technical manual",
    "use": "Lathe patterns, workholding, attachments, and technique."
  },
  {
    "source_key": "FRIED1960",
    "citation": "Fried, Henry B. 1960. The Watch Repairer’s Manual.",
    "source_type": "professional repair manual",
    "use": "Bench methods, jeweling, diagnosis, and repair."
  },
  {
    "source_key": "VERNEUIL1902",
    "citation": "Verneuil, Auguste. 1904. “Mémoire sur la reproduction artificielle du rubis par fusion.”",
    "source_type": "primary scientific publication",
    "use": "Synthetic corundum process and historical context."
  },
  {
    "source_key": "BERGEON",
    "citation": "Dated Bergeon catalogues and current technical documentation.",
    "source_type": "corporate catalogue/technical documentation",
    "use": "Tool-pattern terminology and present availability; not independent priority evidence."
  },
  {
    "source_key": "WITSCHI",
    "citation": "Witschi Electronic technical manuals and measurement documentation.",
    "source_type": "corporate technical documentation",
    "use": "Mechanical and quartz measurement assumptions and instrument functions."
  },
  {
    "source_key": "NIST",
    "citation": "National Institute of Standards and Technology, Time and Frequency Division.",
    "source_type": "official metrology institution",
    "use": "Time references, measurement, and traceability."
  },
  {
    "source_key": "COSC",
    "citation": "Contrôle Officiel Suisse des Chronomètres official testing documentation.",
    "source_type": "official certification institution",
    "use": "Chronometer testing context."
  },
  {
    "source_key": "ISO3159",
    "citation": "ISO 3159, Timekeeping instruments—Wrist-chronometers with spring balance oscillator.",
    "source_type": "international standard",
    "use": "Mechanical chronometer test terminology; verify current edition."
  },
  {
    "source_key": "ISO22810",
    "citation": "ISO 22810, Horology—Water-resistant watches.",
    "source_type": "international standard",
    "use": "Water-resistance terminology and test context; verify current edition."
  },
  {
    "source_key": "CSEM",
    "citation": "CSEM technical publications and project documentation.",
    "source_type": "institutional/corporate R&D documentation",
    "use": "Silicon, MEMS, and horological microtechnology."
  },
  {
    "source_key": "SIGATEC",
    "citation": "SIGATEC technical documentation.",
    "source_type": "corporate process documentation",
    "use": "Silicon DRIE process descriptions; priority claims require independent verification."
  },
  {
    "source_key": "MIMOTEC",
    "citation": "Mimotec technical documentation.",
    "source_type": "corporate process documentation",
    "use": "UV-LIGA and electroformed microcomponents; priority claims require independent verification."
  },
  {
    "source_key": "ELMA",
    "citation": "Elma operating manuals and process documentation.",
    "source_type": "corporate technical documentation",
    "use": "Cleaning equipment and safe process parameters."
  },
  {
    "source_key": "AWCI",
    "citation": "American Watchmakers-Clockmakers Institute technical education resources.",
    "source_type": "professional institution",
    "use": "Current training and service practice."
  },
  {
    "source_key": "BULOVA",
    "citation": "Joseph Bulova School of Watchmaking institutional records and period materials.",
    "source_type": "institutional/archival evidence",
    "use": "Postwar vocational training and adapted benches for disabled veterans."
  },
  {
    "source_key": "OSHA",
    "citation": "U.S. Occupational Safety and Health Administration standards and guidance.",
    "source_type": "official safety authority",
    "use": "Machine, chemical, ventilation, and radiation controls."
  },
  {
    "source_key": "EPA",
    "citation": "U.S. Environmental Protection Agency radiation resources.",
    "source_type": "official safety authority",
    "use": "Radium and legacy luminous-product context."
  },
  {
    "source_key": "SCIENCEMUSEUM",
    "citation": "Science Museum Group collection database.",
    "source_type": "museum collection",
    "use": "Surviving horological and industrial tools."
  },
  {
    "source_key": "MIH",
    "citation": "Musée International d’Horlogerie collections and archives.",
    "source_type": "museum/archive",
    "use": "Horological tools, workshops, machines, and trade history."
  }
]