Published by Whitman, Rancine, Wi, 1942
Seller: Historical Antiques & Collectibles, Oldwick, NJ, U.S.A.
Hardcover/Hardback. Condition: Good. Compact illustrated handbook explaining communication systems including international maritime flag codes, Morse code, secret ciphers, weather signals, and sign language. Pocket reference guides like this were popular during the mid-twentieth century for hobbyists, scouts, and amateur radio enthusiasts. Includes illustrations of national flags and signaling systems used in maritime and military communications.