First day envelope, Lawrence Hargrave Centenary, paper/plastic/metal, Australia Post, Australia, 1994.
Unused Aviation Feats first day cover. Light blue printed envelope, on the left half printed in dark green, orange and brown is a graphic sketch of a biplane and a four wing propeller over a map with 'AVIATION FEATS' over top. 1 x 45c Hargrave stamp cancelled GPO Melbourne, 18 November 1994. Printed in black and green on reverse product information and Australia Post logo. Attached to top left corner is a lapel stud made of gold coloured metal and plastic which features part of the $20 Hargrave banknote.