1928-29, Around-the-World cover, franked with 29 stamps from sixteen stamp-issuing nations and colonies, each tied by appropriate postmark, including issues of the U.S., Gibraltar, Monaco, Italy, Greece, Egypt, India, Ceylon, Straits Settlements, Dutch Indies, Philippines, China, Japan, British Offices in China 8˘ KGV tied by Hong Kong circular datestamp. Highly attractive and somewhat spectacular item with more than four months in transit (Dec. 16, 1928 to May 2, 1929), Fine to Very Fine, presumably unique usage with the Hong Kong "China" overprint, as Weihaiwei was the only British post office still operating in China at this time.
Estimate $300 - 400.
http://stampauctionnetwork.com/v/v65924.cfmHere's a real one:
