Hi,
that is a very nice but "everything is possible" bar, most likely made around 1912 - as the Colonial Medal was awarded.
Enlisted men and lover ranking officials like this one do not appear in Ranklists or Court and State handbooks.
It might be that everything is legit, it might as well be, that the portugese Avis Order does not belong there.
The key is, as Karsten already mentioned, the Avis.
IF he was a long time Colonial Solder or Official, there might be a chance that the award of the Avis Order is mentioned in the Kolonialverordnungsblatt (Colonial Gazette).
I know there are Portugese Orders listings from the Republic onwards, but I have never seen Award rolls from the Royal time.
Lots of greetings
Daniel