It's definitely from Thailand, but I'm not very good with these- someone should come along soon to give the denomination and date.
Here is a link to a pretty good site I find a lot of fun in identifying coins.http://worldcoingallery.com/
this is 1 Baht (1962) coin of Thailand. Date reads as 2505-543 (Buddha's enlightenment in 543 BC)=1962. First coin of Dusitn Haddock is 25 Satang of1957.
...And here I sit in Thailand, while you guys identify the Thai coins. I do not see much numismatic stuff here in the Land of Smiles; found one coin shop 200 km up the road and I heard there is one in Bangkok somewhere. I took a BU Canadian maple leaf 1 oz gold coin into a gold shop here a few years ago, thinking about selling it, and in a very short while some clown in the back room had gouged the heck out of it, I assume checking to be sure it was real gold and maybe judging the softness. I came unglued and said harsh words, never went back to that shop. I learned to never let my coin or ingot get out of my sight. I found another gold shop I can trust, to some extent.