Thailand, 1950-1973 AD., Rama IX, 10 Satang, KM Y 73.

Thailand, Rama IX (Phra Maha Bhumibol Adulyadej, 1946-today), dated BE 2493 (1950 AD.), struck 1950-1973 AD.,
10 Satang (17,5 mm / 1,77 g), tin, mintage 139.695.000 ,
Obv.: ภูมิพลอดุลยเดช. - ... , youthful uniformed bust of King Bhumibol Adulyadej left, one medal on uniform.
Rev.: … / ๑๐. - สต. / พ.ศ. ๒๔๙๓. , coat of arms of Siam, dividing value and denomination, BE-year below.
KM Y 73 .

description of the coat of arms:
A shield in the middle, divided into three quadrants. The first quadrant depicts a mythological three-headed white elephant, or Erawan (in Hindu mythology called Airavata), the vehicle of the god Indra, the creature is set on a yellow field. This quadrant represents the Kingdom of Siam and the Thai heartland, the three heads of the elephant represents the northern, central and southern Siam. The lower left quadrant depicts a white elephant in front of a red field. This quadrant represents the Laotian suzerainty (the symbol comes for its native name "Lan Xang", land of the million elephants.). The lower lower right quadrant depicts two crossed krises (one with and one without a scabbard) on a pink field, this represents the Malay suzerainty to the south.
Above the shield is the symbol representing the Chakri Dynasty, a disc and a trident (chakra and trisula). The shield is then surrounded by the chain of the Ancient and Auspicious Order of the Nine Gems (representing Buddhism) with a chain and pendant from the Most Illustrious Order of Chula Chom Klao (featuring a portrait of King Chulalongkorn).