Definitely not an "issue" blouse, and not a WWII one. My first impression is that it is an officer tailored blouse with enlisted rank on it. The quality of the fabric is the kind of thing officer's blouses were made of, though I have run across proper privately made enlisted blouses with officer quality cloth were legitimate pieces. The shoulder straps with are not sewn down with an "X" at their base suggests further it is not WWII, That was done away with in the few years after WWII. The brass belt loops also suggest officer. If you can, could you please post a close up picture or two of the buttons?