E. F. Johnson Company Catalog. Messenger Communications Systems Catalog. Material: paper. Size: 8 1/2" x 11". Description: white cover; black and white photographs of E.F. Johnson Company products; black and white print: "Johnson, Messenger Communications Systems, Business/Industrial 25 to 50 MCS. AM, 106, 303, 202, 600" information about the Messenger radios; 3 pages.