The design is like the Grohmann knives made in Pictou, Nova Scotia, Canada. Seems to me the tang stamp (G.C.Co) could stand for Grohmann Cutlery Company? I have a couple of Grohmann knives that I have had for over 40 years, however, I have never one handled in anything other than wood. I am heading out of town for a couple of days, however, when I get back I will email a photo of your knife to them, if it is OK with you, to see what they have to say. I have emailed them a couple of times in the past and they have always replied promptly.