The John Russell Mfg company is a wonderful example of early American craftsmanship! Here’s a great link to read more about the company:
http://industrialhistory.org/histories/john-russell-mfg-co-and-the-russell-cutlery/
Antique cutlery doesn’t go for big bucks but you definitely have a great collectible set! Here’s one similar knife current for sale:
https://www.etsy.com/sg-en/listing/629316374/vintage-russell-green-river-works
And here is a general search for russell on AntiquesNavigator:
https://www.antiquesnavigator.com/common-price-guide.php?searchresults=yes&rpp=100&s1st=russell&operator=and&s2=&cat=Antique+Knives&Search=Submit
and finally, here’s a link to a similar set that sold in the past:
https://www.antiquesnavigator.com/d-794465/antique-1834-j-russell–co-knife-3-piece-cutlery-carving-set-w-carved-handles.html
Based on the above links, I would estimate your antique Russell Green River Works knife set to be valued in the $50-150 dollar range.
I hope this information helps.
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