need help with I D

Those are all standard Belgian proof marks.
In the 60's the FN company sold actions and finished rifles to a good number of American companies, including Sears, Montgomery Wards, Colt, and under the Browning name among others.

Unless it has a specific seller or importer name on it it was possibly sold as a barreled action and some individual or company finished it.

Likely a FN supreme action. Ill dig out my 1952 fn in a bit for comparison.

Yeah, the Belgians/Germans/Europeans love their proof marks. Honestly, I like them - adds character. You can probably find a reference on line for the requisite proof marks used at the time if you are on "a mission from God..."
And that is some very well executed checkering - top notch, and points to a very high quality rifle.

Out of curiosity I did s search.
I found this. Maybe it will help.

http://www.nramuseum.org/media/940944/proofmarks.pdf

Open the action and look at the rear face of the barrel. A 98 Mauser sporter action with the left bolt lug raceway cut away as shown in the left hand photo below (1950-dated action), it is post-1949-ish FN.


FN introduced this broaching process as an economy measure to simplify receiver production. I do not believe any other manufacturer used this method, and when you combine it with Belgian proofs, the characteristics are definitive for a postwar FN Mauser action.

If you remove the action from the stock and look on the flat behind the recoil lug on the underside of the action ring, you should find a small single digit stamped inside a partial square or diamond. This is the FN date code for manufacture. The number is the last digit of the year, and the sides present on the square or diamond indicate both the decade and the quarter of the year. I'll scan the chart and post it here later.

Here are the postwar FN date codes, reproduced from FN MAUSER RIFLES by Anthony Vanderlinden:

That's no low end woodwork on that rifle. Are there any clues on the stock as to who put it together.