SunnyD, you did get a pretty good deal. I can honestly say I have never seen a schrade rope or hawk with a poor spring. They tempered them right and I think the heavy swayback nature helped prevent excessive wear, but I'm not sure.
I'm going to guess your knife was made somewhere between 1960 and 1970, purely a guess but the usual 1946-1973 range is too wide, I have noticed the later production waldens and NY USA marked knives had the squarish handles, earlier production (mid 40's to mid 50's) had highly radiused handles and held a higher polished blade, sometimes etched, in short they were of a higher standard as far as fit and finish goes. The NY USA production era hawkbills (1973-1985) had rougher finished handles, square edges, rougher fit and finish overall, but the excellent walk and talk wtill remained. I have handled dozens of schrade hawkbills of different eras (I've still yet to fondle a cut co though

) and this is merely what I have observed. As far as value goes, hard to say. $20ish if someone sees it who like it.