This is an original wartime Japanese Navy manual titled "Revised Latest Signal Flag Method" , published in 1943 (Showa 18). It was issued by the Kinki Educational Union and printed in Osaka during the height of WWII. The booklet covers signal flag methods (semaphore), Morse code, and telegraphy communication terms used in the Imperial Japanese Navy.
Designed as a field manual, it includes. Instructions for single-flag and two-flag operations. Telecommunications vocabulary used in wartime communication. Despite some aging (minor foxing, stains, and a trimmed rear page), the booklet remains complete and highly informative.
It reflects the ingenuity and discipline of Japanese naval operations during the Pacific War. A rare and valuable resource for collectors of WWII militaria, naval history, or signal communication systems. Own a Piece of History.