United Airlines 1956 Internal Report on Radio Equipment SFO w/Photos ADF For Sale

VINTAGE UNITED AIRLINES INTERNAL REPORT... This item is a technical evaluation of Collins. Bendix and Wilcox, aviation radio equipment, specifically ADF which I believe, means Automated Directional Finder. It's about a 100 pages and includes original photographic prints. Pages & photos are approximately 8 & 1/2 by 12 in size. The title page shows that it was commissioned by the engineering section at San Francisco International Airport on October 1st, 1956 and the report number is F- 494. I've taken about twelve pictures to give you a very good idea of its contents and condition. Please have a close look. If you have any questions, feel free to contact me. This item will ship by USPS first class (Ground Advantage) Mail.