I got these two today in a box full of coins and notes, mainly Asian,Japanese invasion money etc, the owner is a deseased POW from WWII captured in Burma by the Japanese. Both copper or bronze and the largest is a tad bigger than a US Nickel. I apologise if I have them upside down or the wrong way.
They are from Thailand and they are both 1 Satang. The larger one is KM 35 they date from 1908 to 1937 At the moment I don't know the date of this one. The second is KM 51 and it is a one year only type from 1941.