Those are great knives.
That three blade, equal-end cattle knife is really pretty.
Robeson made knives for Hibbard, Spencer, Bartlett. And, they made that pattern, both as a three blade and a four blade, with the Federal shield and the lined bolsters. I've owned one, a four blade, but no longer have it. The blades were very similar in shape.
However, that doesn't jump out at me as being Robeson Bone.
And, Robeson made precious few knives with long pulls. It would have to be early to be a Robeson.
I'm thinking somebody else made it.
Maybe our bone jigging historian, Miller Bros. can ID the maker.
Heck, maybe it was Miller Broos.
DE OPPRESSO LIBER
"...Men may spurn our appeals, reject our message, oppose our arguments, despise our persons ___but they are helpless against our prayers. "