Cyprus 1902-04 ½pi green & carmine, variety large "S" in "PIASTRE" (SG 50a).
This variety shows the top part of the letter "S" slightly larger and deformed, and was a retouch to correct a damaged letter on position R1/4 (on both panes) in the sheet. It was corrected with the introduction of a new duty plate in 1905.
We have recently discovered this variety on a stamp, with the additional variety WATERMARK INVERTED SG 50w. Only a very few sheets with the inverted watermark were produced; so therefore only a handful of examples of this variety could surely possibly exist. And furthermore, how many have actually survived?