Finding some new information here and will post for discussion hopefully.
The War Cross was established by Decree No. 2870 of November 30, 1916 to reward acts and deeds of bravery performed in the campaign. The award received notoriety during World War I and during the Portuguese Colonial War. Divided into 1st, 2nd, 3rd and 4th grade, in descending order of importance.
The War Cross, slightly inspired by the French Croix de Guerre (mainly in the colors of ribbon suspension), had, throughout its history, three different types or models, respectively legislated in 1916, 1946 and 1971.
So, it appears there are three different variations in the medal itself and I now believe the sample posted in post #2 above is a 4th Class award of the 1946 type or model, based on a similar example I've seen offered.
Then, based on the information above, the style shown in Post #3 must be the 1971 example?
What are the differences in the four grades or classes? Are there differences in the suspension ribbon (like a rosette) or are they neck & breast type orders?
Getting there...
Tim