Roadside billboards advertised factory products, and most were aimed at wholesalers who purchased parts in bulk: alternators, air compressors, heat pumps. These weren’t objects that you bought for daily use, and they would have posed a challenge for even a good advertising agency. But the billboard design, like everything else, had been rushed, and often the ads consisted of nothing more than a photograph of some obscure part—a widget, a wonket—superimposed atop a sunny green field. Beneath the pastoral sprocket, there was a company name, often in awkward English: Professional Manufacture
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