ZAMBIA
1968 1stamp out of set
1972 1stamp out of set
1980 ##220-223; also exist as ss of 4
1997 ##679-682, sheet of 4 #683
1999 several stamps out of set, sheets of 12 & ss
2000 ##857-862, sheets of 6 ##863-866, ss ##867-870
2002 1 sheet of 6 out of 3 #990, 1 ss out of 3 #993
ZIMBABWE
1986 ##529-532
1992 ##670-675
1995 could be 1stamp with butterfly
2001 ##897-902, also exists as ss of 6
ZAIRE
1971 ##713-722
1977 1 stamp out of set
1996 Sheet of 4 #1454
2000 1 stamp (?) out of 6 #1507, 1 stamp out of sheet of 12 - sheet #1512, 2 stamps out of sheet of 12 - sheet #1513 (could be more stamps in this set)
2000 (#1545) - surcharge on unissued stamp
2001 ##1591-1596, 3 Sheetsof 8 ##1597-1599, 3 SS ##1600-1602