Front
The portrait of His Majesties King Bhumibol Adulyadej The Great and Her Majesty Queen Sirikit The Queen Mother. The watermark features Her Majesty's crowned monogram "ส.ก." With a special translucent effect, the electrotype letter "ก" is clearly visible from both sides when the banknote is held up to the light. On the lower left of the portrait are the Arabic numeral "80", and Thai numeral "๘๐" at the lower right, printed in brown.