It is a RIA rebuild. The collector value is low, but it should be a great shooting gun and one you can enjoy without worrying about decreasing the value of a rare collectible.
(Just FYI, in rebuilding those pistols, the depot and arsenals had absolutely no concern about matching parts or keeping original guns together. When guns came in for rebuild, slides went in one pile, frames in another, and so on. Then they used serviceable (not necessarily new) parts to assemble guns. Remember, they were making guns for killing people, not for collectors over a half century in the future.)