Seeing that Someone was looking for this I thought I should provide.http://www.into-asia.com/thai_langu.../numbers.php
This website has the Thai character and the corresponding numbers.
On older Thai coins (One of my lecturers told me this is no longer the case) translating the date would probably give you something in the 24th century. This is because they use the Buddhist calendar system which started in 543BC. So to get the Gregorian date subtract 543 from whatever the number is, for example if the coin said 2500 the Gregorian year is 1957.
Got some of the unformation from here, which has a neat little excel tool.http://exceltips.vitalnews.com/Page...Systems.html