Chicago Ghost Signs: H-C GASOLINE
A classic “reveal” after a teardown.
“H-C” was the first high-octane gasoline. “The 72-octane auto fuel, developed at its Houston refinery, was better than anything then marketed (Lindbergh's flight to Paris the following year was on 73-octane gasoline). H-C stood for "Houston Concentrate," though some advertising men called it "High Compression." Details here.
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