Picture No | 10091695 |
Date | 1939 |
Description | LOCATING INTERFERENCE |
Details |
The Post office, responsible for all telecommunications, is concerned to locate sources of radio interference, for which this portable device comes in handy
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Source | Cigarette card, Lambert & Butler series, 'Interesting sidelights on the work of the General Post Office' |
Credit | Mary Evans Picture Library |
Restrictions |
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