The Lan-choo Tea Company offered 'prizes' to users who collected 36 of these labels. Lan-choo Tea was first advertised in 1953. These Lan-choo Tea labels @73c were probably in use in the early 1970s (following introduction of decimal currency in Australia on 14/3/1966). These labels were collected by Mrs Win Partington.Black white and green packaging from loose tea.lan-choo tea company, wyn partington