Racal NOS PRC-139 transceiver module 136-174MHz SS-4100821-501

Racal NOS PRC-139 transceiver module 136-174MHz SS-4100821-501, Rev. E NSN 5998-01-369-1531. This is the replaceable RF module which will convert your PRC-139 to 136-174MHz operation, comes with plastic case and screwdriver