Watch List notes:

Northern Bank Limited, specimen £20, 1988, no serial number purple-brown, red and multicolour, airplane at centre, H. G. Ferguson at right, reverse, stylized N at centre, also including, specimen £5, ND (1982), serial number D5040248, light blue, shipyard at lower centre, reverse, stylized arms at centre, (Pick 206s, 188s, Banknote Yearbook NI.615s, NI.633s), red diagonal SPECIMEN overprint, uncirculated, scarce (2).

Estimate: £200 - £250