M1917 finish question (pics of rifle now added)

[Chuckindenver]

looks like its been sandblasted before to me..you can see it on the reciever edge pic. and along the sight ears.. i belive that rifle was originally a parkerized rifle, but has been rebuilt, it does have a replacement bolt..S on the handle..the couple i have seen were iron phosphate coated rather then manganese.. and were very dark, so dark you cant see the annealling on the front and aft of the receiver.
guard screrws, safety, bolt assembly, buttplate screws, and other wood screws, front sight, rear sight, rear sight spring. and pinion screws, follower, and spring, floor plate latch, and pin. bayonet lug screw, should be blue..