British and World Paper Money

Government, One Pound (5), 20 November 1975, J prefix, 15 September 1979, 10 November 1983, K prefix, 21 October 1986, 4 August 1988, L prefix (Pick 20a, 20b, 20c, 20d, 20e) [5]. Uncirculated; a full date set for the type
£100-120