This is pure speculation on my part, but booster aside, I do think it’s an ANH paint job. The V2 also has the copper/brass paint windvane. Most of the ANH pics we have of the Obi stunt sabers are of the V2, which you can spot by the lever. Not sure where the V3 was used, or if it was a back-up. It could have been used in the cantina scenes, no way to know.
The holes in the clamp say to me that that part was used on an ESB Graflex stunt. While the V2 and V3 were retrofitted for ESB duelling, they used the set screw blade retention method not the allen head screws like the Graflex and MPP. Given our limited look at the lower bodies of Graflex stunts, I can't say this for sure— just a theory.
I think onscreen the V3 has its original paintjob in ROTJ that was enhanced to match the hero when it went out on tour. The worn copper of the windvane you can spot in the duel seems similar to the V3.