This neck was broken with a vertical break that is very hard to repair.
I had to make a special fixture to be able to clamp the head and compress it horizontally and vertically at the same time. Of course, you could only clamp the downward pressure until the head of the guitar was at the right degree of angle in relation to the fingerboard gluing it with the west system of epoxy. Then of course you have to clean it all up.
After that, we have to shave off the back of the head approx. 3/32nds to allow for a rear ebony head veneer. This should go into the neck at least an inch pass the crack to insure stability. You have to realize that the strings are pulling approx. 25pds of pressure each so that fibers in the wood of the rear head veneer is what is going to give the neck its strength.
Of course, it is necessary to refinish the complete neck and rematch the colors, and then set the guitar up properly.