Close pair of Bell Laboratories Inc. #21421 Inductor Audio Coils from obsolete US Navy 1950s WE’s Listening and communication panels used to protect New York Harbor during Cold War. Condition: used, checked for 13.3 Ohm and 13.9 Ohm on a meter. Shipping via USPS or FedEx from Brooklyn Navy Yard Pare of Vintage 1950’s heavy duty Western Electric D-10892 Inductor Transformer/Filter Device from Voice processing panels used by US Navy New York Harbor underwater submarine detection and Communication system stored at Brooklyn Navy Yard. We open one thing to show what is inside.
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