As I understand it, the Hudson's Bay Camp knife was a knife with a fairly specific design; J. Gordon calls them "Chief's" or "Buffalo" knives in the above book and gives examples from several English makers; there was some variation in the design from maker to maker. Hudson's Bay Company sold/traded many types of other knives; "Butcher" knives, "Cartouche" knives, "Scalper" knives, "Dag" knives, etc. In the research I have done, I didn't find any specific knife that was called a "Hudson Bay Trade" knife.
Of all the knives I have posted above, although the makers called them or considered them as Camp knives (except for Swampfox; that was bought second hand so I don't know how Mr. Ridge marketed it), I would consider the Montana Americana rendition to be a pretty close approximation of what a Hudson Bay Camp knife might have really been like from Unwin & Rodgers or Wostenholm or S&J Kitchin, given the examples in Gordon's book.
Although I did not show a pic of it, the Bark River Hudson Bay Camp knives have a very passable profile, but they are thinner than what I have read and seen regarding original artifacts.
