This is the original high impedance magnetic headset supplied with vintage Cold War era CDV-700 Geiger Counters, and they are fitted with the now obsolete screw-fit connector. These surplus stock items are no longer manufactured and have become increasingly difficult to obtain

The ones we have are in very good condition showing only very light signs of use or long-term storage so there may be some minor marks and scratches but they are tested, fully functional and ready to use. They may also be of interest to experimenters and work especially well with crystal radios

Several different manufacturers supplied these headsets and due to our changing stocks items supplied may differ from the one shown in the photograph but functionally and in most other important respects they are all the same.