E. F. Johnson Company Aerial View. Material: paper. Size: 9 1/2" x 7 1/2". Description: black and white photograph; aerial view of the E. F. Johnson Company headquarters, plant, offices; identified on the back as 1966, after the addition of the Engineering Department; located on 10th Avenue S.W., Waseca, MN; 299 Johnson Avenue S.W., Waseca, MN; photograph has a plastic laminate.