For whatever it's worth, here's a good article (with illustrations) on Coinage in Bhutan by Nicholas Rhodes
http://mms.thlib.org/typescripts/00...043/1560.pdf
I also believe that the updated term for a deb is a matam.
http://mms.thlib.org/typescripts/00...043/1560.pdf
I also believe that the updated term for a deb is a matam.