WWII Joint Army-Navy Nomenclature System (JAN) Manual – Signal Corps Restricted Edition, January 1943

Original World War II Joint Army-Navy (JAN) Nomenclature System manual issued by the U.S. Army Signal Corps, dated January 1943. Published by the Office of the Chief Signal Officer, Research and Development Division, this restricted publication established the standardized nomenclature system used to identify and classify military communications, radar, radio, and electronic equipment across Army and Navy services. An important reference document from the formative period of military electronics standardization and the precursor to many equipment designations still recognized by collectors today.

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