Olive-colored Queen Victoria's Head（橄欖棕色香港維多利亞女皇像）

Olive-colored Queen Victoria's Head

Estimated value: US$824,648

The Olive-colored Queen Victoria's Head, printed in 1864, is the most expensive historical postage stamp of Hong Kong. The face value of the stamp was 96 Hong Kong cents (12 US cents) and it should have a brownish-grey tone. However, due to a printing error, 52 sheets of the stamp were printed in olive color. The watermark was wrongly styled, and the word "CC" was printed in the wrong place.

Among all 40 pieces of the Olive-colored Queen Victoria's Head that can be found in the world nowadays, there is only one block of four such stamps existing. It has been collected by a number of famous collectors. In January 2012, it was auctioned off for 6.4 million HK dollars (US$824,648), setting a record in the history of Hong Kong stamp auctions.