1979 saw the competition change from a knock-out to 4 groups of 4, with the 4 group winners progressing to the semi-finals.
Group A
Date|Winner|Score|Loser|Score|Venue
28/03/79|Easts|19|Manly|7|Leichhardt Oval
2/05/79 | Brisbane | 13 | St George | 10 | Lang Park
30/05/79 | Easts | 12 |St George| 6 | Leichhardt Oval
27/06/79 | Brisbane | 13 | Manly | 10 | Leichhardt Oval
18/07/79 | St George | 7 | Manly | 4 | Griffith
25/07/79 | Brisbane |17 | Easts | 8 | Lang Park
Group B
Date|Winner|Score|Loser|Score|Venue
4/04/79 | Cronulla | 22 | Canterbury | 8 | Leichhardt Oval
11/04/79 | Penrith | 12 | Auckland | 5 |Leichhardt Oval
9/05/79 | Penrith | 18 |Cronulla |10 | ?
30/05/79 | Canterbury | 12 |Auckland |3 | Leichhardt Oval
4/07/79 | Canterbury | 18 | Penrith | 10 | Leichhardt Oval
11/07/79 | Cronulla | 30 | Auckland | 10 | Leichhardt Oval
Group C
Date|Winner|Score|Loser|Score|Venue
18/04/79 | Parramatta |44 | North Sydney | 10 | Leichhardt Oval
15/05/79 | Qld Country |16 | Newtown | 14 | Lang Park
13/06/79 | Newtown |15 | Parramatta | 13 | Leichhardt Oval
20/06/79 | Qld Country | 12 | North Sydney | 5 | Lang Park
4/07/79 |Qld Country | 18 | Parramatta| 9 | Lang Park
11/07/79 | North Sydney | 35 | Newtown | 13 | Leichhardt Oval
Group D
Date|Winner|Score|Loser|Score|Venue
25/04/79 |Wests | 22 | Balmain | 11 | Leichhardt Oval
23/05/79 | South Sydney | 25 | NSW Country | 10 | Leichhardt Oval
6/06/79 |NSW Country | 14 | Wests | 11 | Leichhardt Oval
20/06/79 | Balmain | 5 | South Sydney | 3 | Leichhardt Oval
11/07/79 | Balmain | 25 | NSW Country | 11 | Leichhardt Oval
18/07/79 | South Sydney | 9 | Wests | 7 | Leichhardt Oval
Semi finals
Date|Winner|Score|Loser|Score|Venue
1/08/79 | Cronulla | 13 | South Sydney | 9 | Leichhardt Oval
8/08/79 | Brisbane | 8 | Qld Country | 5 | Lang Park
Final
Date|Winner|Score|Loser|Score|Venue
15/08/79 | Cronulla | 22 | Brisbane | 5 | Leichhardt Oval
Player of the Series
Kurt Sorensen
AMCO CUP wiki link
Group A
28/03/79|Easts|19|Manly|7|Leichhardt Oval
2/05/79 | Brisbane | 13 | St George | 10 | Lang Park
30/05/79 | Easts | 12 |St George| 6 | Leichhardt Oval
27/06/79 | Brisbane | 13 | Manly | 10 | Leichhardt Oval
18/07/79 | St George | 7 | Manly | 4 | Griffith
25/07/79 | Brisbane |17 | Easts | 8 | Lang Park
Group B
4/04/79 | Cronulla | 22 | Canterbury | 8 | Leichhardt Oval
11/04/79 | Penrith | 12 | Auckland | 5 |Leichhardt Oval
9/05/79 | Penrith | 18 |Cronulla |10 | ?
30/05/79 | Canterbury | 12 |Auckland |3 | Leichhardt Oval
4/07/79 | Canterbury | 18 | Penrith | 10 | Leichhardt Oval
11/07/79 | Cronulla | 30 | Auckland | 10 | Leichhardt Oval
Group C
18/04/79 | Parramatta |44 | North Sydney | 10 | Leichhardt Oval
15/05/79 | Qld Country |16 | Newtown | 14 | Lang Park
13/06/79 | Newtown |15 | Parramatta | 13 | Leichhardt Oval
20/06/79 | Qld Country | 12 | North Sydney | 5 | Lang Park
4/07/79 |Qld Country | 18 | Parramatta| 9 | Lang Park
11/07/79 | North Sydney | 35 | Newtown | 13 | Leichhardt Oval
Group D
25/04/79 |Wests | 22 | Balmain | 11 | Leichhardt Oval
23/05/79 | South Sydney | 25 | NSW Country | 10 | Leichhardt Oval
6/06/79 |NSW Country | 14 | Wests | 11 | Leichhardt Oval
20/06/79 | Balmain | 5 | South Sydney | 3 | Leichhardt Oval
11/07/79 | Balmain | 25 | NSW Country | 11 | Leichhardt Oval
18/07/79 | South Sydney | 9 | Wests | 7 | Leichhardt Oval
Semi finals
1/08/79 | Cronulla | 13 | South Sydney | 9 | Leichhardt Oval
8/08/79 | Brisbane | 8 | Qld Country | 5 | Lang Park
Final
15/08/79 | Cronulla | 22 | Brisbane | 5 | Leichhardt Oval
Player of the Series
Kurt Sorensen
AMCO CUP wiki link