1981 Extremely Rare Stamp Sheet

An extremely rare special sheet - Only 10 copies are believed to have been sold  incorrectly over the Gibraltar Post Office counter in 1981. The samps are SG Catalogue 451-3 1981 but this were only issued as a Booklet and here we have a complete uncut sheet of 20 stamps plus four labels. The sheet is in very fine unmounted mint condition. It is a very difficult Gibraltar item to come accross with with only a handful having appeared at auctions in the past decades. Last known sheet sold at auction went for £1,010. A sheet for the very serious collector of Gibraltar stamps who wishes to add a very unique and difficult to find item