Year 2008 is 2551 in Thai. The image below is Thai Numbers from 0 - 9
Here is a thai coin, 10 baht, or sip baht. The year is normally engraved or written on the upper write corner on the reverse of the coin. This coin is minted on 2550 which is 2007. The amount of the coin is written at bottom of the coin, first in Thai script then the word "bat" (Baht) followed by a number 10 in Roman numerals. I cannot remember what is written on the upper left of this coin. The other side would be the image of the current monarch.
The image of the thai numerics are handwritten, the typed one would be a little closer to what is engraved on the coins itself.
I found about a dozen Thai coins and got a couple dozen more from lots. It took me years to both find and read the dates.
I still have a few that I just can't get since the coin font is slightly different then the written font and typed font.
I got to remember your post next time I find Thai coin, great description.