Esquires mostly top-loaded?

Fender did the top load in late 58 through 59. They switched back in 60. More meat to the sound with the regular bridge string through IMO. It is a nightmare to convert. The holes rarely line up exactly. Of course, if you have the proper drill press and measure accuratelyi it can be done. Most I`ve seen with normal power tools have been catastrophies at best.

 

+1

If you were ever going to do it, you must use a drill press and preferably make a jig for the back - or measure and mark extremely accurately... which is harder than it sounds. Go through to halfway from each side with a slightly undersize drill, then join up the holes with the full size, and only then enlarge the back ones for the ferrules. If you don't do this, you will get enough drill 'wander' - even with a drill press - that the holes on the back don't line up properly, it will look a mess and you might not even be able to get all the ferrules in.

 

Caretaker called it - Fender went to a top loader sometime in 1958 (my March '58 Tele is string through body while a friend's Aug. '58 Tele is a top loader). However I think they went back to string through body in late 1959. You will see Teles and Esquires made after that with bridges drilled for both. Apparently, Fender produced a ton of top loading bridges and rather than toss them simply redrilled the existing stock.