Luxembourg 1966 - 20 Francs Color Trial Specimen (Pick 54cts)
Color trial specimen of the twenty francs note of the Grand Duchy of Luxembourg dated 1966, produced during the advanced evaluation phase of the Grand Duke Jean series within the Belgian Luxembourg Economic Union framework. Printed by Thomas De La Rue and Company, London, this example represents a controlled press-stage trial where final color relationships, engraving visibility, and overall tonal balance were assessed prior to full production approval. Read more →