Nice weathered ROTJ Vader Stunt lightsaber. Question : Are you certain the bottom is from a G R A F L E X 3 Cell? I mention this because there were salt-and pepper shakers that could be converted easily into the bottom part of a 3 Cell to accommodate 2 Cell tops and alter them into lightsabers.
I honestly don't think the bottom is a 3 cell. It has a smooth end cap so it's could be. The top is a vintage though. But it was so badly scratched that I had to weather it.