Great Britain, 20 pounds, 1988-1991, UNC, p380e and p384a (RARE Pair of notes in Bank of England hand made folder, 1970 Series "D" Issue, last prefix 20X 9996691991 Series "E" Issue, First Prefix A01 999669NO certificate)
serial number: A01 998549, 20X 998549, Queen Elizabeth II portrait, it is a quality folder with leather hardcover, a rare product