This tells me this particular neck was made September 13th, 1985.
Unfortunately the neck pocket of the body on mine is less revealing...there is a hand written "SST" which seems to indicate "Squier Stratocaster" and there is a "BLK" which would seem to indicate the original color (and this body is certainly "black") but not much else.
The good thing is that either way these are typically very fine instruments.
Obviously I haven't played every single instrument to ever come out of that factory...
So as far as dating the instrument itself..at the neck heal and the neck pocket.