That is a bicentennial Russell Green River, has ebony handles, stainless blade. Probably 420 carbon steel, but the knife companies of the era never revealed the exact type of steel in their knives.
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and I purchased that knife in the 1980's from a store that is gone. You can find them on ebay, but the prices for the bicentennial knives are crazy. I don't know why the Dadley pattern is rarer than others, but from the number of specimens on the market, Russell company must have made fewer.
All of the Green River patterns date to the 1830's, and these were the knives that "won the West". Their butcher, hunter patterns, and most particularly, Russell Barlow's were ubiquitous.
What patterns Dexter Russell offers now varies by year. Some of the Green River knives, they are still making
https://www.dexterrussellcutlery.com/green-river/
if you don't see the Russell brand on the blade, then it is probably not made by Russell.
https://www.crazycrow.com/green-riv...set=0&Offset=0&Per_Page=12&Sort_By=disp_order
This would have been authentic to the period, an eating knife.
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Many used the eating knife instead of a spoon. Identifying characteristics are the rounded tip and beveled back. High society thought eating knives were bad manners, but like many things, their behavior had been shaped and molded by the advertising industry to increase cutlery sales. Even today, "cultured people" have to eat using a vast collection of cutlery, cups, and glasses. Truly an example of advertising induced behavior.
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Medieval people ate with their fingers and a knife, and slurped their soup from a bowl. Or poured it over their bread. Cave man, was even worse, how did they ever survive without a salad fork?