Hi Rebwa - I know little about the curved knife.  I was given it by my mother when I was a teenager as part of a butchering kit that she bought from an old hunter at a garage sale.  I store it in a split piece of fire hose and use it for skinning big game.  It is carbon steel and sharpens easly to a very sharp edge.  I see them for sale on the back cover of "Backwoodsman" Magazine.
Got to go!
Mike