You are purchasing (2) used Narco automatic direction finders. They have ADF 30 and ADF 30A on the front. They have CN93A and CN93B printed on the back. Both are 12 volt. The 30 looks to be complete. All knobs seem to move as they should. The tuning knob moves the dial needle. I don't know what moves the left needle. The 30 is missing the case cover. The selector plastic knob on the center bottom is broken. Both may be missing parts. Both are being sold for parts. Both are untested. I believe these to be for a 60's aircraft but not certain of the application. 

NOTE: I have a 20 foot cable and an antenna sensor in other listings. I will combine shipping.