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[1952] BNCO Mobil Directo Air Raid Siren
(lemmy.ca)
For sharing images of vintage magazine ads, fliers, promos, etc.
We're going to play it pretty loose with timeframe here so please don't get offended anyone :)
From the copy it's "civil defense directors". So presumably, those were local officials in at least a quasi-governmental capacity with a budget to buy stuff like this.