Thank you for sending in your Thai Btonze buddha to Mearto for assessment. This seems to be a Thai Bronze Buddha of the Ayutthaya style but more likely than not 19th century from the quality of the casting and facial style. It is nevertheless a nice bronze piece seated with one hand blessing the earth. Originally the style would be 15th-16th century and the Ayutthaya style is also very similar to Kanpaeng Phet.
It is nice that there is still a clay core showing it was cast using the lost wax method and this also indicates it is not of recent fake as this looks of good colour and consistency
Many thanks
Mark
Mearto