SRR-100

SRR-100 (CIA) 1970's bodyworn Surveillance scanner. Consisting of a receiver unit, an induction loop worn around the neck and a commercially-available Phonak earpiece. A false silicon ear was fashioned for each user to conceal the earpiece. Operatives could listen to KGB surveillance chatter and determine if they were 'black' - meaning clear of surveillance. Later models included frequency hopping capability.

BELOW: SRR-100 displayed by KGB after apprehension of CIA officer Martha Peterson during TRIGON support operation, Moscow.