With the crisp line still visible on Rama's lapel and the steps on the back, I'm shying away from mint issues.
It looks like an acid bath or just heavy ware from washer or driveway.
also the Thailand y183 1 Baht (1986-2008) appears nickel in color yours seems bronze, is that just lighting?

It looks like an acid bath or just heavy ware from washer or driveway.
also the Thailand y183 1 Baht (1986-2008) appears nickel in color yours seems bronze, is that just lighting?























