​​​​Original oil and gas vintage magazine ad for KELLOGG SWITCHBOARD SUPPLY COMPANY.  Microplex microwave system sets new standards of reliability.  Backed by the worldwide technical, manufacturing, installation and operating experience of ITT. Features printed circuits, miniaturized components, minimum maintenance and occupies only the and one half feet of rack space.  Main office was located at 6650 S. Cicero Avenue, Chicago, IL.
​ This 1959 unique old one page petroleum industry trade advertisement would display beautifully matted and framed.