I have two 1989 Hong Kong Expo medals with the NGC encapsulations indicating 1989 G. Britain S 5oz, British Royal Mint Issue. 2625374-001&002. I can easily determine from the encapsulations that these medals were from Great Britain and were Royal Mint Issues. At the time of encapsulation, I was a little disappointed that they did not indicate China on the slab. After reading the various comments and discussion, I am pleased to have NGC encapsulations which clearly indicate the origin of my wonderful medals.
Mark Bonke