That's weird, the Kona is my second mountainbike, and my first was a Townsend Hot Rock, so they share a name!
I have never noticed an E stamped anywhere, not even when I stripped the paint.
Incidently, when I stripped the yellow line repaint off, there were remenants of some dark red paint, I put it down to primer, but it could have been the original finish?
Also, it has Kona stamped into the rear dropouts, I don't know whether this is year specific or a standard?