Australia New South Wales 1899 9d on 10d dull brown error, SG309a

Australia New South Wales 1899 9d on 10d dull brown, watermark 40, chalk-surfaced paper, perforations 12x11½ (comb), error surcharge double, SG309a.

A brilliant quality mint example with original gum and lovely fresh colour.

The 10d value was not issued in this colour without surcharge.

A very fine and rare Queen Victorian surcharge error.

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