Another vote for the Barlow if we're talking slipjoints and Bowie if we're talking fixed blades.
I don't know, Phil.
The bowie got the glory and the rep, and theres no argument that if you ask any joker off the street to name a knife from the old west, the bowie would come out of most mouths. Heck, Its been the star of a couple of movies, from Alan Ladd and on.
But starting with the mountain man era and the need for a skinning/trade knife, again the large butch knife. The John Russell company comes out again in many records of trading posts orders. Well after the heyday of the mountain man was over came the hide hunters, the buffalo hunters. The Russell company sold a bunch of their skinner and Green river patterns for years till the animals were near wiped out. A Green River knife in trade was worth a horse to an indian. The Russell Green river knife was so popular that the English knife companys even copied the marking for the indian trade.
And most people heading west for a start of a new life busting up the sod, were not well off people. Like the plain saw finish bone handled barlow, the Russell butcher knife was a staple of supply as well as having a couple extra for trading. They needed low cost/effective tools for the job. Settlers, army scouts, hide hunters, all used the John Russells company knives.
Thats alot of Russells knives sent west in the 1800's.
I just wonder if there were more Russell green river knives carried around in homemade sheaths, or even nicly beaded sheaths, over the period from the 1830's to the last days of the frontier, than bowies.