Acquire this note yesterday. I am really happy to add this piece into my 555555 collection.
A scarce 1938 Thailand 1 Baht solid 55555 ( only 5 digits serial number ) Type 4. He is King Rama 8.

King Ananda Mahidol or Rama VIII (long royal name: Phrabat Somdej Phra Paramenthara Maha Ananda Mahidol Phra Athama Ramathibodinthra Thai: พระบาทสมเด็จพระปรเมนทรมหาอานันทมหิดล พระอัฐมรามาธิบดินทร (roughly "HM King Ananda Mahidol, the Eighth Ruler") (September 20, 1925 - June 9, 1946) was the eighth king of the Chakri dynasty of Thailand.
Early life
Prince Ananda Mahidol Mahidol (Mom Chao Ananda Mahidol Mahidol — หม่อมเจ้า อานันทมหิดล มหิดล) was born in Heidelberg, Germany. He was the first son of Prince Mahidol Adulyadej of Songkhla (son of King Chulalongkorn) and Mom Sangwal (last title Somdej Phra Sri Nakarindhara Boromaratchachonnani) who were studying there at the time. King Vajiravhud, his uncle, sent a telegram on October 13, 1925 auspiciously naming him "Ananda Mahidol" (อานันทมหิดล), meaning "the joy of Mahidol". ("Ananda Mahidol" is one word and is his first name. It is pronounced "Ananta Mahidon". When he held his birth rank of "Mom Chao" -- the lowest rank of Thai princes, he used the surname of "Mahidol" from his father; his name at this point was thus "Mom Chao Ananda Mahidol Mahidol").
He followed his parents to Paris, Lausanne, and then to Massachusetts when, in 1927, another uncle, King Prajadhipok issued a royal edict exalting him to the higher princely class of Phra Worawong Ther Phra Ong Chao. (This edict also benefited other "Mom Chao" who were the children of Chao Fa and their commoner wives, among them his elder sister Mom Chao Galyani Vadhana and his younger brother who, upon his birth later in the year, was born Phra Worawong Ther Phra Ong Chao Bhumibol Adulyadej).
The family returned to Thailand in 1928 after Prince Mahidol finished his medical studies at Harvard University. Prince Mahidol died at age 37 in 1929, when Ananda Mahidol was just 4 years old. His widowed mother was thus left to raise her family alone.
A coup d'etat in 1932 ended the absolute monarchy and raised the possibility that King Prajadhipok might abdicate. Queen Savang Vadhana, his grandmother, was concerned about Prince Ananda Mahidol's safety, since he was one of the likely heirs to the throne. It was then suggested that the Mahidol family again move to Lausanne. The official reason given was for the health and further education of the princes. They left Thailand in 1933 and Prince Ananda Mahidol spent most of his youth in Switzerland.
However, when King Prajadhipok's abdication appeared imminent, the Prince's mother was approached by a member of government, asking for her opinion about Ananda Mahidol becoming the next Thai monarch.
http://en.wikipedia.org/wiki/Ananda_Mahidol