I'm new in this forum and would like to find someone who can help me.
I have two silver thailand coins.
I've identified one as the 1 Bath Rama VI, Y45.
https://en.numista.com/catalogue/pieces12261.html


But I don't know which one is the other. It has the same size (30,4 mm) and material (Silver) that the Y45 but doesn't appear in the Numista's catalog. The portrait of Rama V is the same that appear in Y39. But the reverse is diferent.
This is the coin:


Could anyone find out which coin is that?
Thanks in advance!