Signal was a modern, glossy, illustrated photo journal and government propaganda tool, patterned after the American LIFE magazine and meant specifically for audiences in neutral, allied, and occupied countries. It was available in the United States in English until 1942. A German edition was distributed in Switzerland and to various other countries with a strong German military presence, but Signal was never distributed in Germany proper. Signal was published fortnightly in as many as 25 editions and 30 languages, and at its height had a circulation of 2,500,000 copies. The last number was 6/45, only known in one sample from the Swedish edition.