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    "label": "PIR-9 fuze",
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    "metadata": [
        {
            "label": "Collection",
            "value": "Caltech Photographs"
        },
        {
            "label": "Series",
            "value": "Scientific Instrument Photographs"
        },
        {
            "label": "Extents",
            "value": [
                "1 photographs (negative)"
            ]
        },
        {
            "label": "Abstract",
            "value": [
                "For 11.75-inch aircraft rocket. 6.84\u2033 long. Steel and aluminum alloy. Designed as an improvement to the PIR-2 by upgrading strength, sensitivity, and performance at oblique impact, safety, and ease of loading. Had as a companion PIR-14 for use in 5.0\u2033 HVAR. PIR-9 development was halted when it was discovered that the PIR-19 (Mk163) offered sufficient improvement with less radical modification."
            ]
        }
    ],
    "attribution": "<p>These digitized collections are accessible for purposes of education and research. Due to the nature of archival collections, archivists at the Caltech Archives and Special Collections are not always able to identify copyright and rights of privacy, publicity, or trademark. We are eager to <a href=\"mailto:archives@caltech.edu\">hear from any rights holders</a>, so that we may obtain accurate information. Upon request, we\u2019ll remove material from public view while we address a rights issue.</p>",
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                    "label": "ST-RK-11",
                    "width": "416",
                    "height": "281",
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