20 pounds Scotland/essay uncirculated banknote design 2018
Private graphic essay specimen banknote (not legal tender)

Prefix: "M"
Dimensions: 147 x 77 mm 
Date of print: 13. 08. 2018
Numbering: with unique individual numbers  
Front side: David Hume (1711 – 1776), was a Scottish philosopher, historian, economist, and essayist, who is best known today for his highly influential system of philosophical empiricism, skepticism, and naturalism.
Back side: The Dugald Stewart Monument is a memorial to the Scottish philosopher Dugald Stewart (1753–1828). It is situated on Calton Hill overlooking the city of Edinburgh and was designed by Scottish architect William Henry Playfair. It was completed in September 1831.
Amount produced: 1155 pcs,  Polymer banknote with clear window.