Ocean Park Hong Kong Series No. 16 – Adventures in Australia (set of 6) (Hong Kong)
We list this once under “Australia” for obvious reasons, but the set was produced by Hongkong Post and sold in Hong Kong. Six unused postage-prepaid cards from October 2015, each with first day of issue special postmark. The scan shows the fronts of three of the six cards, and the reverse of another. Grade: 1