If not, then the photo will show up in the NAA under the search term "Duchess of York 1927" on the second page of results. The barcode number is 1991357. NAA http://www.naa.gov.au/
A description of QEQM's apparel worn with the opal might match HM's clothes in the photo. The bouquet certainly matches; the asparagus fern can be seen clearly.