GSGS series 4228. Second Edition (coloured)-AMS 3. Copied from an Italian Istituto Geografico Militare map dated 1931, partially revised for communications in 1942 and reprinted in 1943 by the U.S. Army Map Service. The meridians are based on the meridian of Rome, which is 12 degrees, 27 minutes and 7.1 seconds east of Greenwich. South Italy Grid (Blue).
