New here, but not new to Mausers, I'm no expert, just a guy who likes mauser rifles. That said all the
1909 Argentines, that I have seen, have been a deep blue or faded blue, even the re-arsenal ones.
The only Parkerized one's that I've seen were done by the owners, 1-black/grey , 1-green.
My 1909 Cavalry Carbine has a "in-the-white action with everything else "blue" and likely re-arsenaled
1926 or later, as it has the bayonet lug thru the "Mannlicher" type stock.