ca 1960? 20 pages, datasheet inserted. Halftones & drawings of switches. 11x8.5", stapled booklet, 3 punched holes. Light corner stain, VG.
ca 1960? 24 pages, 12pp Bulletin & 2 Datasheets inserted. Halftones & drawings of systems, components. 11x8.5", stapled booklet, 3 punched holes. VG.
ca 1960? 24 pages. Halftones & drawings of switches. 11x8.5", stapled booklet, 3 punched holes. VG.
ca 1960? 32 pages, 2 datasheets inserted. Halftones & drawings of switches. 11x8.5", stapled booklet, 3 punched holes. VG.