For sale is reprint of National HRO (Reception Set R-106) Communication Receiver manual. Manual is 14 Pages long, Dated January 1944. Manual was published by British Army Staff North America. Manual includes 2 pages of factory test forms. HRO receiver was used extensively by British Signal Intelligence during WW2. Real Paper Manual. Quality Printed and Comb Bound. Printed from available copy or scanned from original at 600dpi, restored in Photoshop, Laser printed on premium acid free paper, they will serve for years. Cover page printed on Cover Stock.