Well, if one was to frequent e-bay regularly, they would get the idea these pipes were from the fur trade period as there's always listings for these but then so are cow bells, non-dug Dutch coins, modern beads, fantasy pieces, and other unrelated items.
Kinda like harmonica reeds, 3-ringers, and generic sash buckles always being Civil war related even though I find buckets of the stuff far, far away from any battles.
However, I do live in the heart of the fur trade and have a fair amount of experience in this field.
My opinion is that these pipes are too late for what I call the fur trade era. Not to say that some trapper didn't have one in the late 1800's and that certain northern regions still shot musket guns and trapped furs well into the 20th century.
To be more precise, I think these are called "Pamplin" pipes and were manufactured in the late 1800's.
Also, what I would classify as fur trade items would mean companies like the HBC, NWC, etc. would have to carry them in their inventory, thus the term "Trade goods."
Still, they are nice finds!
Cheers,
Dave.