South Africa 1918 Wanderer's Flight, Australia Address

SA: 1918 "Make your 6d fly". Small Wings FIRST DEMONSTRATION (WANDERERS) FLIGHT card with KGV 1d tied cds 20.NOV, the 1d paying overseas rate to AUSTRALIAN addressee. Dark blue on red printing. F-VF, sound example, scarce flight card. Message side reads: Ex Barry Smith.