English: Six tube radio receiver from about 1920, made in France by Fernand Vitus (logo in bottom left). This, according to [1], is the 1924 Super Mondial, apparently a top-of-the-line model for the period. This was a tuned radio frequency receiver. The 3 large knobs adjust the capacitors of the 3 tuned circuits, to tune the radio to a new station. All 3 had to be adjusted simultaneously to the station's frequency for the radio to operate.
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