Opinions On Nepal Coins

They look fair dinkum to me.

Nepali coins are always thin, and were often made of silver of dubious quality, so they always "feel fake and sound funny" compared to a solid silver coin from Britain or the Americas. But the Chinese fakemasters don't seem to target these - they're too small and thin. There may be a cottage industry making fakes of these in Nepal itself, but I haven't heard anything to that effect.