...covering Australian comics
"Milo" is a group of two reprints.
While Nestlé produced a children's comic based on its Milo product, it doesn't seem to have used the same imagery in any of its advertising. However, the advertisements in other publications help date these two reprints.
The Milo cans shown in each of the editions varies slightly.
Milo's Wonderful Journey also uses the tag line 'One of Nestlé's good things'. Australian Nestlé advertisements used the tag line 'Another of Nestlé's good things' periodically, notably in 1951 and again in 1955 and 1956.
The Wonderful Story of Milo uses the tag line 'If it's Nestle's, it's good - very good!'. The phrase 'it's good… very good' appears in Nestlé advertising from 1954 to 1955.
It seems likely that Milo's Wonderful Journey was published about 1951 and The Wonderful Story of Milo in about 1954/55.