Looks a lot like your silver coin with the shell, style- and fabric-wise. Or the Burma coin. Are are those both Burma? Hmm, I don't remember.
Like these: https://www.cointalk.com/threads/ancient-south-east-asian-silver-conch-shell-coins.271314/
I will be giving this coin a bath and rephotographing - and maybe a write up for those that might be interested, I also have a few of his relatives on the way!!!!