Factual error: In the WW1 British bunker flashback, a radio is part of the puzzle. This radio design is WW2 to early Cold War era (1930s-1950s). WW1 wireless sets were far bulkier, usually spark-gap transmitters or early valve sets, with open wiring and large coils, not compact boxes like this. The connectors and dials are consistent with WW2 British WS No. 19 or similar.
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