The thong prajam thahaan bok is the regular flag of the Thai Army Corps. It consist of the national tricolour, with in the centre a sunburst and a chakra, and the pathum unnahlohm (fig.).,In the top left corner is the Phra Maha Phichai Mongkut over the King's the initials in a pale blue notched circle.

See also POSTAGE STAMP.