Single ferrule is the most simple construct. Rat-tail tangs need to be forced into the handle so the metal furrule 's require to keep the wood from splitting.
1965 and star indicate Vietnam origin 's make sense. But sheat and handle are in Shan/Lanna style, not in chinese style as most vietnamese craft. The knife might be made by Burmese smith living in Vietnam. Or another possibility 's knives are bought from Lao or Lanna and then engraved in that way by dealer himself. My guess...
