Bidspirit auction | Egypt rarity - 1st issue

Egypt rarity - 1st issue 1866 10 piastre stamp in blue-slate with 13x13 perforation & upright waterm - Egypt rarity - 1st issue 1866 10 piastre stamp in blue-slate with 13x13 perforation & upright watermark with 9 rays in the sun (SG #7d/w); possibly used as without gum, but not tied by postal markings. This is not a re-perforated imperforate proof stamp, among other reasons, because the paper is watermarked with the correct design (documented with 9 or 10 visible sun rays) & the paper is rough and fibrous as documented for the type used for the postage stamps. Est. catalogue value £2200+