CoverCraft 1988 Australian Bicentennial Bert Hinckler Commemoration set of 3 commemorative covers.Cover 1 has full set of 1974 Universal Postal Union stamps cancelled by Bert Hinckler Commemoration special handstamp.Cover 2 has pair of UPU stamps and pair of Australian stamps including Hinckler 18c stamp cancelled by GPO Darwin special handstamp.Cover 3 has above Australian stamps & handstamp and is signed by The Hon.Steve Hatton,Chief Minister of Northern Territory,Australia.