FENDER GUITAR PICKUPS
Here are a few pictures of Fender Stratocaster guitar pickup assemblies from various years. Notice that the older black bobbin pickups had no date applied to the bottom. The grey back pickups which show up in 1964 have a yellow stamp applied to the back. This in turn changes to a handwritten date. Note the use of a pearloid back on the pickguard assembly from 1969. This is only found on some pickguards from 1968 and 1969 and is totally original. The pickguard was white-black-pearloid in construction.
Formvar wire was used on all the Strat pickups up until 1964. After the company was sold to CBS, like a lot of things, changes were made and they switched from Formvar to plain enamel. The first list below, in the pull-down menu, is a list of wire guages and number of turns for Fender guitar pickups. The second list has some basic Fender pickup specs.