Produced by the Victoreen Instrument Company starting in 1963, the CD 717 was a modified version of the ubiquitous CD 715 Gamma Survey Meter, featuring a removable ion chamber and extension cable to allow radiation readings to be taken from safely inside a fallout shelter. 100,000 were ordered by the American Office of Civil Defense (OCD), remaining in inventory until the 1980s when they were surplussed onto the civilian market.
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