Found this image of the caseback.
It says Overseas Portuguese Armed Forces, with a typo… This has been brought up before in portuguese forums and their provenance is still up for grabs.

: Wow! This is very interesting.
: Not only the watches in itself, but the context of it all.

: Being portuguese myself, I can confirm that the dials indeed
: mention Armed Forces for all three portuguese ex-colonies in
: Africa. Also, if we assume the usual dates for those compression
: cases, this put these watches right in the middle of
: independence wars going about in these countries. In which
: "side" is a hard guess, though.

: My question, are these actual Heuers or just something else using
: the same compression case, as we see so many brands from that
: time doing so? I can quite recall seeing a JLC and a Breguet
: with the same case in their museum.

: Cheers,
: Rodrigo