Welcome to Stamp Community Forum!
A quick glance at your Argentines, they appear to all be fakes. Without going into details for each specific stamp, but just a list of problems among the stamps:
-- paper is way too white/clean
-- "C" should not be touching/crossing the inner frame
-- waviness of frame is not correct
-- right frame is too bowed around FRANCO
-- sun rays and mast/lines appear identical on all your stamps (this is NOT true of the originals)
You are free to seek a paid expert opinion, but I believe you would be wasting your money.
Great space-fillers, though!