Ditto on the congrats. All Parkers warrant that.
The coloration is very far from OEM.
This is claimed to be original. Snagged from Guns International
When I soaked the rust seized action/frame of 108603 for a very long time, the rust did come off and left a very similar look to the metal. Kinda like "in the white". Maybe it was chemically treated a long time ago and then left before doing anything further. Just a thought. Also noted that the stock head appears to have been "pinned". This may indicate the stock head is cracked inside or it may have been done as a preventive measure to avoid cracking/breaking in the field. This is seen on occasion and is also not OEM. Wonderful to have some original paper with the gun.