Original old petroleum trade magazine vintage ad for LENKURT ELECTRIC COMPANY of San Carlos, CA.  Subsidiary of GTE.  Radio and microwave systems cover thousands of route miles in theUS and Canada.  For low density needs, the 71-class radio equipment provides toll grade service for up to 48 multiplex v-f channels.  For medium density service, the 74-class microwave equipment, with capacity of 300 or more channels, is large enough to serve as the backbone communications systems of almost any company.  For high density conditions, the solid-state 76-class microwave equipment accommodates 600 or more carrier-derived voice channels, a color TV channel or the equivalent in other forms of communication.  General Telephone and Electronics.  This 1962 two page gatefold oil and gas industry advertisement would display beautifully matted and framed.