AUSTRALIA NEW SOUTH WALES 1899 6d deep orange, (UNUSED) SG305aAustralia New South Wales 1899 6d deep orange, chalk surfaced paper, watermark 40, SG305a, IMPERFORATE lower left corner block of 4 with partial plate number. Fresh mint example with large part original gum. Upper left stamp with minor gum blemish, which does not diminish in any way the fact this is a highly attractive and very scarce positional piece. Accompanied with a Philatelic Foundation of New York (PF) certificate of authenticity (2002) as