Cold War-era Russian body-worn radio direction finder and intercept receiver known as 'FILIN,' developed around 1970 as a covert means to locate clandestine radio transmitters and to intercept communications of adversaries. Used by Eastern Bloc secret services like the KGB and the Stasi, the curved design of the receiver allowed it to be easily concealed under clothing. The receiver measures 8.5″ x 6.5″ x 2.25″, and the top notes the model and serial number ("??.?-?, N178034"), and features a frequency scale, antenna input, and mode selector. The front has knobs for fine tuning, sensitivity, and volume, and a switch for field strength/reception; the on/off and far/near switches are missing. A small, wearable antenna box is attached, as is an original headphone speaker. The power cables remain attached to the receiver, but have been cut at the ends. This unit, the Filin Model-B (?), operated in the 60-150 MHz range. In very good condition, with scattered scuffs and scratches,
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