Controversies
At one point, it was suggested that the 1c stamp was merely a "doctored" copy of the magenta 4c stamp of the 1856 series, a stamp very similar to the 1c stamp in appearance. These claims were disproven.
In the 1920s a rumour developed that a second copy of the stamp had been discovered, and that the then owner of the stamp, Arthur Hind, had quietly purchased this second copy and destroyed it. The rumour has not been substantiated.
In 1999, a second 1c stamp was claimed to have been discovered in Bremen, Germany. The stamp was owned by Peter Winter, who is widely known for producing many forgeries of classic philatelic items, printed as facsimiles on modern paper. Nevertheless, two European experts, Rolf Roeder and David Feldman, have said Winter's stamp is genuine. The stamp was twice examined and found to be a fake by the Royal Philatelic Society London. In their opinion, this specimen in fact was an altered 4c magenta stamp.
Read more about this topic: British Guiana 1c Magenta