That stamp sounds like a very rare Australian philatelic error/variety , but I can’t reliably confirm how many are known from the available evidence here. One search result points to general Australian stamp error discussions, but not a verified census of this exact stamp found in Queensland in June 2026.

What can be said safely

  • The wording suggests a 1937 Australian “2d red” King George VI-era issue with a “Sesqui” error/variety and a koala/tree-themed description used by collectors.
  • I do not have a verified count of how many examples have been found in Queensland or Australia-wide from the accessible material.
  • For rare stamp finds like this, counts can vary a lot because the same item may be reported privately, sold at auction, or discussed in collector forums without a formal registry.

Best practical reading

If you’re asking “how many have been found,” the safest answer is: no publicly verified total is established from the sources available here. In the stamp market, that usually means any precise number should be treated cautiously until backed by an auction record, specialist catalogue note, or expert certification.

What to check next

  • Specialist Australian error catalogs and auction archives.
  • Philatelic dealer listings for comparable descriptions.
  • Collector discussions, which may hint at scarcity but are not proof of a count.

Bottom line

I can’t confirm a trustworthy number for this find from the information available here, so the honest answer is unknown publicly.