Hello, I am new to the forum. Thank you for inviting me. I was surfing the net to find some information on a dagger knife that I had just picked up from a collection from Idaho. It has stamped on blade Russell Green River Works with two diamonds. It looks to be very old and in pretty good condition. I have yet to find one like it so I can date it. The balde is 9" and the overall length is 15". Any help would be appreciated. Thank you Bill