In
guitar anatomy the headstock is a part of the
neck, the part being all of the neck located between the
nut and the end of the neck not meeting the
body. The headstock exists as a place to locate the
tuners. Almost all
guitars, be they electric or acoustic,
Dobro,
Bass guitars, have a headstock - there are a handful of
models that do without it through some type of ingenuity.
Different headstock shapes are used by brands to distinguish themselves - some
strat copies look exactly the same as a
Fender save for the headstock.
The traditional headstock, as seen on
classical guitars, is often referred to as a 3 + 3 configuration as 3 tuners are located on the top and 3 on the bottom.
What follows a breakdown of guitar writeups by headstock type, based on my own knowledge, the writeups themselves and any updates I receive. (/msg sud with updates)
Guitars with 3 + 3 headstocks:
Guitars with all tuners on the top: