Had an Atty blow out on me today, so I figured I would take it apart. More or less it was a decent attempt.
The first image is the coil that is just under the bridge. The bridge is somewhere on the floor, but I don't think it matters much as it was/is similar to the other that is already posted.
This image is the inside taken out, the ground wire (black) was disconnected when I pulled the insides out. The Red wire is hot, it was soldered the the battery end (see the dab of solder). The Ground was soldered just below, and inside inner wall of the atty itself. (Note the part that screws into the atty was destroyed when taking it apart.
Mesh removed - Note that the casing not plastic it is ceramic.
Finally here is everything together, and the coil unraveled. There coil itself was wrapped around some sort of black fiber, or maybe that was just burnt crap. There is no ceramic cylinder inside the coil. The Red wire is still attached the the red wire.
It is of my personal belief that more CURRENT notvoltage will extend the life of the atty, and a wider gauge coil will provide more surface area and therefore more vapor. The higher the voltage the more heat, the less lifespan the atty has, this is not to say that heat is not needed, just that when we have now is enough if not MORE then enough to boil the juice. - Then again these are just conclusions that I have come to after reading several posts on these forums, so I take no credit for any of this paragraph.
Hope this helps in some way.
The first image is the coil that is just under the bridge. The bridge is somewhere on the floor, but I don't think it matters much as it was/is similar to the other that is already posted.

This image is the inside taken out, the ground wire (black) was disconnected when I pulled the insides out. The Red wire is hot, it was soldered the the battery end (see the dab of solder). The Ground was soldered just below, and inside inner wall of the atty itself. (Note the part that screws into the atty was destroyed when taking it apart.

Mesh removed - Note that the casing not plastic it is ceramic.

Finally here is everything together, and the coil unraveled. There coil itself was wrapped around some sort of black fiber, or maybe that was just burnt crap. There is no ceramic cylinder inside the coil. The Red wire is still attached the the red wire.

It is of my personal belief that more CURRENT not
Hope this helps in some way.