A synchronic clock, Syncro-Clock, made by Finnish Broadcasting Company's workshop, and an oscilloscope used to monitor potential deviations in signal voltage level and waveform distortions as well as other disturbances in the signal, 1944. The time of photography is estimated with an accuracy of a month.
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<a rel="nofollow" class="external text" href="https://www.flickr.com/people/124495553@N05">Archives of the Finnish Broadcasting Company Yle</a></div>
July 1944<div style="display: none;">date QS:P571,+1944-07-00T00:00:00Z/10</div>
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