Trah phaen din, the former unofficial coat of arms of the Kingdom of Siam consists of the Great Crown of Victory (fig.), flanked by two chattra, i.e. multi-layered parasols (fig.) and a symbol of kingship. Under the crown is the symbol of the Chakri Dynasty, i.e. a chakra disc intersected with a trident (fig.). Underneath those is a shield which is partitioned into three sections, with in the top part the 3-headed elephant Erawan (fig.), i.e. the symbol of ancient Siam (fig.) and signifies the Thai part of the Kingdom.

On the bottom left section of the shield is another elephant, which refers to the Laotian suzerainty, whereas the bottom right section of the shield depicts two crossed Malayan short swords, known as kris (fig.), which represent the Malay suzerainty.