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Aircraft radio telephony transmitter, complete with round valve and microphone, 1915 | Science Museum Group Collection
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Walkie-talkie Kenwood Corporation Ultra High Frequency Two-way Radio Telephony, PNG, 985x460px, Walkietalkie, Bandes Marines,
![Aircraft radio telephony transmitter, complete with round valve and microphone, 1915 | Science Museum Group Collection Aircraft radio telephony transmitter, complete with round valve and microphone, 1915 | Science Museum Group Collection](https://coimages.sciencemuseumgroup.org.uk/images/263/820/medium_1935_0618__0001_.jpg)