THAILAND. Rattanakosin Kingdom. Sirikit Kitiyakara, Queen, 1950-2016. 300 Baht (Gold, 21 mm, 7.46 g, 12 h), on her 36th birthday, BE 2511 = 1968 AD. Diademed and draped bust of Sirikit to right. Rev. Crowned monogram within wreath. Friedberg 28. KM (Y) 89. Good extremely fine.