Australia SG40ba 1/- Blue-green 3rd Wmk BW33k FLAW through TRA U/M lightly toned

Australia SG40ba 1/- Blue-green 3rd Wmk BW33k FLAW through TRA U/M (lightly toned). Spectacular Error. I am splitting a Fantastic collection of Australia which is where this item has come from. (M/M means hinged mint and U/M means Mint never Hinged)