1917 1d Full Face Reply Lettercard on Buff Card Zig-zag Roulette 15 'GIANT RED GUM, VIC.' outer half of separated Reply Lettercard in Red-brown with error 'Obliterating Bars Printed Double' (one set diagonal), slight perf separation, minor bend on view side. The diagonal line on the view side proves the overprint was made before the outer and reply cards were separated. Four different double strikes known, with two views recorded like this, rare and very fine mint. Illustrated in catalogue. BW LC29ca(50), cat AU$1000