This Australian definitive stamp features a finely engraved portrait of Queen Elizabeth II wearing the George IV State Diadem, a common motif in Commonwealth postal issues. Printed in deep violet, it carries a denomination of 7½ pence, reflecting the pre-decimal currency used in Australia prior to 1966. These stamps were widely circulated for everyday postal use and are part of the long-running Queen Elizabeth II series, which holds historical significance as it marked the transition from King George VI issues to those of the new monarch. Highly collectible, this issue represents an important era in Australia’s philatelic and royal history.