Help With (I Think) South Viet Nam

I worked my way through a lot of about 500 mixed Viet Nam and identified most all. However, I've spent about an hour with my Scott catalogs, SCF searches and Duck trying to ID the pictured. I think they are South Viet Nam??
Thanks all for your assistance.

1 : Vietcong,1971,Michel # 43
6 : military stamp ("franchise militaire")

Second stamp: Show as 1967. Michel 69 or SG 12.

Third stamp: Show as 1975. Michel 58.

First stamp. Show as part of series from 1971. NLF. SG 41?

Fourth stamp. 1976. NLF. Fruits (sic) of So Viet Nam. Three-stamp set. Michel 62.

Fifth stamp. Also part of "fruits" set.

Eighth stamp: Scott 1036. Part of four-stamp series. 1980: Roses.

Hi,

I use Michel catalogue:

From left to right:
1) NLF (Vietcong), Michel 43, June 6, 1971
2) NLF (Vietcong), Michel 12, December 20, 1967
3) NLF (Vietcong), Michel 58, January 28, 1976
4) NLF (Vietcong), Michel 62, March 1976
5) NLF (Vietcong), Michel 63, March 1976
6) North Vietnam, Military stamp (Portofreiheitsmarke), Michel 23, December 22, 1973
7) NLF (Vietcong), Michel 36, February 15, 1971
8) Vietnam, Michel 1074, January 1, 1980

I can send you my Vietcong stamp album PDF, it's free.

Great and perfect feedback. Thanks all.
Phil, thanks for the offer but I am all big blue on albums.