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Yes, in 1986 the Republique Centrafricaine issued a set of stamps honoring the Challenger astronauts. In fact, there are two errors in this set. Christa's name is written "McAulife" and Ronald McNair is spelt "MacNair". I have a block of 6 unused Christa stamps which were purchased directly from a post office in the RCA. If you wish more info, please contact me at fhsutcliffe@gmail.com Regards, Frank
One sheet of the 24 cent airmail stamp was printed with the airplane printed up-side-down and sold before the error was discovered. This is undoubted the most famous error stamp in US postal history.
I have sheet of CPA stamps I can sell you.
Gerty Cori's stamp will have the error.
Answer:The Inverted Jenny error stamp is Scott Catalog # C3a. The error occurred in the printing process when a sheet of stamps was accidentally placed in the printing process in backwards. Of the 2.1 millions stamps of Scott Catalog # C3 only one sheet was ever found with this error. The sheet of stamps was purchased for $24 dollars in 1918 at the post office and shortly thereafter sold for $15,000. The person who purchased the sheet of stamps for $15,000, broke up the sheet and sold single stamps until they were all sold. Today a single stamp from this sheet is cataloging for the price of:$500,000.(Scott Specialized Catalog of US Stamps & Covers 2011, page 350)Note:The number of C3 stamps that were printed are listed on page 532 in the catalog. (2,134,888) that would be 21,348 sheets of 100 printed.------------------------------------------------------------------------------------------------------The inverted Jenny error, Scott Catalog #C3a, is probably the most famous error in American philately. Only one sheet of a 100 of these misprints were ever found, though there were at least 300 more printed.An inverted Jenny was sold at an auction in June 2005 for $525,000. A block of four inverted Jennys was also sold for $2.7 million in October 2005.
There are links below to a proof sheet of stamps and a picture of a single stamp.
Imperf is the abbreviations for Imperforate. Perforations are the holes or cuts made to allow you to separate stamps in a sheet or roll. Imperforate means that the stamp is either intentionally made like that, requiring the user to use scissors to cut them apart, or that the step was missed, creating an error.
The linkage between the glucose group and the phosphate is wrong on the stamp. It should be --OPO3
This is a two-cent stamp, so a sheet of 50 sold for $1. You would find it hard to get more than that for it, unless you chanced upon a collector who especially wants one. These stamp can still be used for postage, but who want to put 21 of them on his letters?
All error coins need to be seen. Take to a collector or coin dealer.
That would be Scott number US 2496. A full sheet of these stamps has a catalog value of $44.10.
These came out in 1968, both the coil and sheet type.