It doesn't have a groove in the upper neck, I believe, because they put gaffer on it to dress it up like the V2 (they even dressed the emitter face), but it does have the same clamp band details on the V3 resin stunt.
Beyond those two shots, Hamill climbing up the sail-barge and the previous R2 lauch, the only other scenes in the film that probably have the resin stunts are the inserts of the hilt going into the air and falling down.
Speculation aside, I don't believe there are resin Yumas of that time because I've not seen any resin copy of the Yuma sabers that had the original "blank" box, nevermind the ISYHCANL details; the resin Yumas I've seen all have the Hero's "cave build" box detail. Now, it may have been possible they made resin Yumas minus the box, but every resin stunt we've seen thus far has the box/clamp detail as part of the cast.