I just picked up a good to very good condition Fenwick glass rod, model FF705 (7' 5 weight, planning to put a half-weight heavy #4 DT on it, probably RIO Grand). It was worth $40 to me and the guy I bought it from was happy with that, but I suspect I got quite a deal. Any input?

The rod's serial is N179614. Richard Parks suggests it dates from the late 60s. Any idea?