Sample 1:

Manufactured in China for Angola.  Fabric is a thin poplin material and Chinese hardware is used throughout, such as on the buttons and snaps.

Arm Pocket:

Lower Pockets:

The cut is very similar to Type 87 uniforms in use by the Chinese PLA  at the time (Chinese version does not have lower zipper pockets).  Lower zipper pockets are separate from the larger flap one they were placed on top of.

Zipper:

Usage Photo:

Besides Angola, this style of uiform was used by the armed wing of the ANC (African National Congress), uMkhonto we Sizwe (MK).  Nelson Mandela, one of its founders and commanders and later President of South Africa after the Border War, is shown wearing the same model jacket below:

President of the African National Congress, Nelson Mandela (left) salute ranks of Spear of the Nation, the ANC army which had waged a 30-years campaign of sabotage against the apartheid government, on Thursday, Dec. 16, 1993 in Soweto, South Africa. Standing next to Mandela is spear of the Nation Leader Joe Modise (from https://whatculture.com/history/18-mind-blowing-facts-you-didnt-know-about-nelson-mandela?page=10).