I don't think Archer's example is at all the same category of dagger that we are discussing here though it is interesting to see.
Your link to the discrediting of the author you cite doesn't lead to an article. Do you have another link? I am not sure what claims are discredited, but this is not the first time i have heard of meteorite as a source of iron for some of these daggers, the "Killer Whale" dagger in particular.