E. F. Johnson Company Catalog. The Hamalog, T-1. Material: paper. Size: 5 1/2" x 8 1/2". Description: white paper; black print: "The Hamalog, Catalog T-1, Radio Supplies for Transmitting, E.F. Johnson, Fast Becoming THE Amateurs' Supply House, Waseca, Minn."; 27 pages.