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. '
I struggled to get a close-up of Drozd's headstock but they look near enough to me
