VAM is a term that only applies to Morgan and
Peace dollars. You are asking if it is a recognized variety. Unfortunately there is no standard reference for varieties of the nickel
Three Cent pieces. (The best book had a very small printing and has been out of print for years. And even so it only scratched the surface.) As far as I know there are no variety listings for rotated dies. That doesn't mean they don't exist or are rare, just that they aren't considered to be a variety. (You don't create a new variety just because a die rotates in the holder.)