there was bit of speak on the difference in the jazzmaster neck and the stratocaster neck.
im here to set the record straight, there is a difference, both in the headstock shape, and the heel shape,
these are two templates.
the one with the frets marked is a 62 strat, and the blank one is a 59 jazzmaster.
fist off.
the headstocks. the strat on top, jazzy on bottom.

here are the heels with the jazzy on top

and here is one with the strat on top

and here is where itraced out the two on the same peice of scrap mdf to try and show how the jazzy is more rounded and a bit narrower than the strat.

final conclusion.
the jazzy is a lil bit thinner,not much, maybe only 2 mms altogether, and it is more rounded, but not alot more.