From Wiki:
In 1862, a new 5¢ stamp of Davis, this time utilizing typography, was issued in large quantities. Produced by the
De La Ruefirm in
London, it employed an engraving of Davis by Jean Ferdinand Joubert De La Ferte (1810–1884). De La Rue shipped 12,000,000 copies of this issue to the Confederacy, accompanied by a set of printing plates and a supply of English
paperso that additional copies could be produced locally. More than 36,000,000 of the 5¢ Davis stamps were subsequently printed from the De La Rue plates by
Archer and Dalyin Richmond. Archer and Daly eventually ran out of the English paper, and their later printings on Confederate paper tended to become increasingly coarse, with individual examples exhibiting blank areas in the design from plate damage or filled in areas due to plate wear.
With all this information, is Wiki wrong? On something like stamps, I really don't see how.
I find it hysterically funny that the first thing the CSA did with stamps was to dump the U.S. rule that no living person be printed on a stamp, and put their fearless leader on the stamp. The parallels with present stamp history are too funny for words.
Edit - I'm not sure what your concern is regarding whether Wiki is wrong or not.
If you're concerned about the color of the first stamp or the location where it was printed, there do seem to be sources indicating that the first stamp may not have been printed in London and the stamps printed in London may not have been green.
You got Jefferson Davis right, and that's all I care about.
Hoosier