Handset with PTT (Push-to-talk) switch; part of MQ-300 manpack VHF radio communication equipment.
Used by the US military during WW2, designated TS-15.
Used by the IDF during the War of Independence (1948) and the Sinai Campaign (1956).
Carbon microphone and 250 Ohms impedance receiver; using two plugs: PL-68 for the microphone, PL-55 for the earphone.
