While the 1d black was engraved in Great Britain by Perkins Bacon, other values, including the 4d blue, were produced by Horace Samson in Perth using lithography, and with different frames around the swan design for each value.
When Alfred Hillman brought the printing stone out of storage, he found that two of the impressions had been damaged, so he had to redo them.
One of the replaced frames was tilted; the other was accidentally redone upside-down.
Only 15 complete copies, plus a part of a stamp in a strip of three, have survived.
4 - White collection, State Library of New South Wales.