For some reason the Starscream coronation set included a Leader-1 head.

There's some reviews of the set on Youtube, including this:
http://www.youtube.com/watch?v=s2Wqqi66QJs

Most versions I have seen have put it on a Seekers body.

EDIT: and I have painted it! The blue trim is now black (that might not have been visible from the pics), the serial number on the nose and Decepticon symbols have been sanded off and the chest and shoulder pads have been re-painted.