Though the photo from this fateful 1982 meeting between Margaret Thatcher and Deng Xiao Ping is from PR China, the unused postcard was released by the Hong Kong Philatelic Society, stamped and postmarked on 1 July 1997 — the date of Hong Kong’s return to Chinese rule.   The Chinese text translates as “China and Britain hold diplomatic negotiations on Hong Kong issue”.  (“Negotiations” can be a flexible term.)  Grade: 1