Radiacmeter IM-179 Gamma Rate Meter

Used by Egon in Ghostbusters on the rooftop scene with Gozer. IM-179 by the following companies: Victoreen Instrument Company, Nuclear Corporation of America, Jordan Electronics, Heat Pipe Corporation of America. ORAU Museum: "The IM-179/PD was 'a miniature gamma ratemeter for placement in aircrew survival kits' that employed a pressurized ion chamber. It only used two push button controls: read and test. The meter and dial are luminescent (Ra-226 radioluminescent paint) . The instructions on the case are self-explanatory."