Australia 1966-1973 Queen Elizabeth II “Decimal Currency – Galah’. 15c. rose-carmine, black, grey and light bluish green. Left marginal strip of 5. Error, ‘Rose-carmine completely omitted from middle stamp, stamp above and the below stamp with partial omissions’. Superb unmounted mint condition. British Philatelic Association Certificate No. 81,204 (2013). AN OUTSTANDING AND EXCEEDINGLY RARE POSITIONAL PIECE ONLY 10 MINT EXAMPLES BELIEVED TO EXIST. AN EXHIBITION PIECE.