Telex Telethin Earpiece Driver .
Impedance 125 ohm.
With Non polarised 2 pin connector socket.
Model RTV-04.
Part Number F01U118019 (60012003).

Telex Announcer Set CES-2 complete with 3.5mm jack
F01U118419 The next stock available from Telex will not be until June 2024.
Some time after all the Summer Events have started???