OK, only 2 version have the entire world on the map: “Classic”, which is usually second edition, but also includes the rather rare 1st edition, and the Hasbor CD-Rom game (also called 3rd edition) and “Revised”
If you game includes the units Artillery and Destroyers, you have Revised.
If your game says “Milton Bradley” on the box, you have Classic
If the starting income is: R 24; G 32; UK 30; J 25; USA 36 you ahve Classic
If startign income is R 24; G40; UK 30; J30; USA 42 you have Revised