“Revan was power. It was like staring into the heart of the Force. Even then, you could see the Jedi he would slay etched on his soul.” Review of Revan’s Sith lightsaber!
Update: We found the official lightsaber!!!
Star Wars: Jedi vs. Sith – The Essential Guide To The Force Issue # TPB (Part 1), page 22
It is ALSO very similar to the “default” model of lightsaber in Knights of the Old republic, as there was only one model!
Some comparison pics: