You stated she has an Officers slide l'll guess that is stamped on the slide so that is your point of reference l am going by. If that is what you have then it's not likely factory unless all the numbers match (on the frame, barrel and underside of the slide) but that can be original. Since very few people put the two together. As for value if she goes bang then she's a shooter otherwise a part gun to be modified even more. lf there were a bit more information we as the group can be more accommodating.