Therefore, while helpful in determining a of production dates, a neck date is obviously not a precisely definitive reference.
Most specifications for a given Fender instrument model change little (if at all) throughout the lifetime of the model.
Notice that there is quite a bit of overlap in numbers and years.
This information is courtesy Fender.com, republished here for your convenience. instrument production history, production dates have been applied to various components.
Hit the jump to see just how old that guitar or bass really is. Most notably, production dates have been penciled or stamped on the butt end of the heel of the neck of most guitars and basses, although there were periods when this was not consistently done (1973 to 1981, for example) or simply omitted.