The very rare double overprint on cover is roughly opened at the top, the front of the cover and the stamp itself is untouched, it is supplied with an RPS Victoria (Royal Philatelic Society) certificate.
Two sheets of the 3d was issued with double overprint. The second impression is weaker than the first, and is 1mm to the left, and slightly higher than the first overprint. Examples of a similar, but a closer double overprint (from another sheet)have been used on cover cancelled at
No. 8 Aust. Base P.O. -7 Nov 1947, shown above. This cover is one of only two presently recorded.
Rob
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