Under the heading 'Tuning Keys'
'1965-1975 Fender made “F” Tuners. Earliest F tuner equipped guitars feature Kluson tuner hole piloted necks with factory filled screw pilot holes. There are also a small number of Jazzmasters with factory equipped Grover tuners. These tuners have a square pearloid button and a hand engraved F on the rear cap of the housing. These necks usually have a veneer on the rear hiding the doweled F tuner pilot holes.
I should also mention the rare Grover tuners available in the late 60's. For a period of a couple years starting in 1967, Fender sold Grover tuning keys in the parts line. They also unofficially sold these gears on some guitars. Mainly they are found on Coronado's, but I have seen them on four Jazzmasters, one Jaguar, and two Stratocasters. The factory used a veneer on all of these examples to hide the F tuner screw pilot holes. The veneer work is difficult to spot. I didn't even acknowledge them until I bought a fire damaged Coronado with the veneer peeling off the back. Then each time I saw a guitar with these I inspected for a veneer. Sure enough all the factory original examples had the veneer. '
![Image](https://web.archive.org/web/20160321051704im_/http://jimshine.com/jazzmaster/groverfront.jpg)
I struggled to get a close-up of Drozd's headstock but they look near enough to me
![Image](https://64.media.tumblr.com/0f7a96ba063038cfa0d72c738b8deede/tumblr_myztqdypgQ1raiekio1_1280.jpg)