Australian Heritage Card Series
series of 96 collector cards
which were issued in packets of Billy Tea from Lyons Tetley Australia

This picture shows some samples from what appear to be different print runs, which include:
darker brown print - lighter red brown print - rounded corners - squarer or crooked corners
protective coating clause (" this card has a protective coating ") or lacking the clause

Cards circa early 1990s (note Keating card says PM 1991 - )