An extremely rare 1893 6c Green error stamp from Hawaii is expected to see the top bids in Robert A Siegel Auction Galleries' United States Stamps and Possessions sale, to be held on July 29-30 in New York.
The stamp forms part of a strong Hawaii section in the auction, estimated at $29,000. It is one of only six known used copies, and is described as an "exceptional philatelic rarity".
When the Provisional Government of Hawaii took control from the Kingdom of Hawaii in 1893, they made two errors with overprinting the existing stamps of the nation.
One sheet of 10c red brown stamps, normally overprinted in red, was overprinted in black, while a single sheet of 6c green stamps was overprinted in black, as opposed to red.
The 6c sheet was bought by Postmaster Jos M Oat, who sold it to dealer JH Makins in 1901. Many of the existing examples were said to have been destroyed in the San Francisco earthquake of the same year.
Also starring is a 3c brown stamp from the US' 1875 re-issue of the 1861-1866 issue, estimated at $17,500.
While 10,000 examples of the stamp - printed from the same plate as the 1861 issue - were made, just 465 were actually sold and the remaining 9,535 were destroyed on July 16, 1884.
Of the 21 used examples of the stamp now known to exist, just seven are considered sound copies, making this a highly desirable stamp for collectors of United States definitive issues.
Paul Fraser Collectibles has an exceptional collection of rare stamps for sale, including some of the finest errors in the world.