The King Rama VI Royal Cypher Medal was granted for first time in 30 December 1910. According to a Siamese royal court news, printed in the Royal Gazette Vol.27, 31 January 1911, This medal has 5 classes:
First Class: King Vajiravudh's royal monogram "ว.ป.ร." and the border of the medal decorated with diamonds
Second Class: King Vajiravudh's painted royal monogram "ว.ป.ร." with the border of the medal decorated with diamonds