Features a Rare Mint No Gum Very Heavy Off Centered Error Variety 1978 Australian Famous Aviator Harry Hawker Variety 18c Error Stamp. That is Missing Most of the Second Vertical White line on the Tail Section of the Plane. The edge Perforations are also Touching the First Digit of 18c denomination & both H/Hs that are Partially Cut off on the left-hand edge, with a slither of the adjoining Stamp to the right of the issue as Pictured. A Near 50+ year old Error Single, bound to be desirable variety to acquire.