Lot 50728 – 1971 50th Anniversary of RAAF 6c with BLACK OMITTED in mint nh lower marginal block of four

1971 50th Anniversary of RAAF 6c with BLACK OMITTED (face value, inscriptions and biplane) in mint nh lower marginal block of four, one stamp with light handling bend, a very rare and truly spectacular multiple of which only 20 exist, Scherer guarantee handstamp on reverse of lower margin, plus normal block for comparison (SG £12,000+)