Odd that's it's dated "1980." The post-CBS larger headstock was standard at that time. The first attempt at the original smaller headstock was in 1980 with "The Strat" which got the proportions wrong. Yours is definitely not that. And the true to the pre-CBS reissues didn't come out until late 1982. Even then those weren't true to the originals. Fender didn't have true clay dot reissues until a little later. Also, the spacing on the dots at the 12th fret is quite wide - signaling a reissue or perhaps maybe a secondary market neck? Not sure if Warmoth or Mighty Mite or the like were making reissue necks like that at the time. If it really is 1980 or before, then most likely it isn't Fender. If it is 1980, I'd wager it's a secondary supplier, or maybe even Japanese. Maybe Tokai with a new decal? In any case, a beautiful neck with just the right amount of wear/patina. You got a winner for sure.