Royal Thai Army Unit Colours (1962-1979)
The Flags of the Military Divisions B.E. 2505 [1962 AD]
This is a tricolor flag with a crown in the top left-hand corner, the identity of the King conveyed by the appropriate ordinal number in yellow. Beneath the crown, from which blue rays of light radiate, are his Majesty's initials – in red outlined in yellow. The outer edges of the flag are trimmed in yellow braid, 2 cms wide.
An announcement by the Ministry of Defense, dated December 22, B.E. 2505, issued in line with the Royal Decree of B.E.2479 [1936 AD] concerning flags, specified the materials to be used to embroider the patterns on the flags of the various military units.

The military flag currently in use – the ChaiChalermpol Flag – follows the pattern specified in a special Royal Decree of B.E.2522 [1979 AD] concerning flags.FOTW
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Sodacan