Original old petroleum trade magazine vintage ad for LENKURT ELECTRIC COMPANY of San Carlos, CA.  One or 600 channels, 46A radio carrier equipment has been engineered to economically handle both extremes in light-route and heavy-route traffic.  Using 46A you can install a 12 channel group that is completely self-contained, expand up to 120 channel system, incorporate this equipment in to a heavy-duty system capable of handling up to 600 channels. Subsidiary of General Telephone and Electronics.  This 1962 two page gatefold oil and gas communication industry advertisement would display beautifully matted and framed.