E. F. Johnson Company Manual. Messenger Selective Radio Paging Office Manual. Material: plastic, metal, paper. Size: 10 7/8" W. x 11 1/2" L. x 2 1/4" D. Description: green vinyl over cardboard - silver metal inside spine support and three metal rings - white lettering on front: "Messenger Selective Radio Paging Office Manual E. F. Johnson Company Waseca, Minnesota, U.S.A. 56093" and Viking/J encircled logo.